Firefox Addon

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey. [FIXED] Certificate issue causing add-ons to be disabled or fail to install: May 5, 2019: We released Firefox 66. Installing the Pocket browser extension installs buttons that let you save items or view your list with one click. These addons can also help in extracting audio from an FLV video file. Add-ons can also enhance your overall. This holds a (hopefully complete) collection of the removed extensions as they were available from addons. The current browser isn't Mozilla Firefox, click here to download the Extension for Firefox, Run Firefox; Select Main Menu > Add-ons > Extensions to open Extensions page. You are probably reading this article, because you want to cleanup some of your add-ons in Firefox. Secure Login - Mozilla Firefox add-on. 52 compatible with the older versions of Firefox. Need a Replacement Firefox Addon: Check Out Our Guide Here. Mozilla have ascertained that an expired security certificate is to blame and a hotfix is being deployed now. For starting Mozilla Firefox without addons follow these simple steps: Go to Start > Run and type Firefox -safe-mode A windows will pop up, Check the option Disable all add-ons , if you want you can check other options too but it is not mandatory. There are three types: extensions, themes, and plug-ins. Firefox is well known for having great add-ons. Firefox comes with a Default theme and optional Light and Dark themes but you can add new themes to Firefox. A while back, Mozilla implemented the add-ons signing as a "security" feature, designed to protect users from "malicious" add-ons. In addition, when you try to install an add-on with the pref set to false, Firefox lets you enable it with one click. Go to Firefox Add-ons page and find NordVPN or just follow this link. I've just updated Firefox to its newest version and IDM integration into Firefox stopped working. IDM does not take over downloads from Firefox anymore. Today, we listed the best Mozilla Firefox plugins. Please enable it to continue. NET Framework Assistant for Firefox enable XAML browser applications (XBAPs), loose XAML, and ClickOnce applications to work with the Mozilla Firefox browser. If you think you agree with the list, comment below. Click the menu button , click Add-ons and select Extensions. Since there are so many different add-ons available to download, it can be a little overwhelming to pick out which ones you should be using. Once you install any Firefox extension, the shortcut of …. We are listening!. Mozilla Firefox (or simply known as Firefox) is a free and open source web browser which is enhanced by the availability of numerous add-ons for it, including some that are designed to protect your privacy and security when you browse the web. Having trouble loading a Pearson webpage in Firefox? Click here for the steps to allow add-ons. Firefox Add-on Options. If you're looking to file a bug relating to the addons. In the past, there were several toolsets for developing Firefox extensions, but as of November 2017, extensions must be built using WebExtensions APIs. These extensions are usually delivered as. In Windows RT, add-ons aren't supported by either Internet Explorer or Internet Explorer for the desktop. With demand for screenshot extension on Firefox increasing, there are many screenshot addons for Firefox available in the market. Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product. Thunderbird Firefox Add-on Archive This archive contains various (but not all) older style add-ons compatible with Waterfox. UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey. This includes adding new features or modifying existing. If you want to opt-out, download and install the add-on for your web browser. Trusted by thousands. An automated WAVE analysis of the home pages for the top one million web sites shows widespread accessibility issues. Firefox has adopted the "speed dial" format with tiles back in 2012, but its default new tab page is not particularly customizable. Gecko Driver – Launching Firefox Browser In Selenium 3: Selenium WebDriver scripts which were working fine yesterday are not working today? Why it is not working? Every Selenium Tester has this question. They can all be accessed from the Add-ons menu, and users can get more add-ons if they want. 1 ein Fehlerbehebungs-Update seines neuen Android-Browsers veröffentlicht. Write Simple Firefox Addon which adds a JS to website section. If left on default, ProCon limits itself to filter pages containing explicit content automatically, based on the text. If you are an avid Firefox user and want to increase your productivity while using Gmail in Firefox, here are some useful Gmail Add-ons. ProCon filters any type of content on any web page. Dear Experts, Is that possible to install firefox addon silently without user intervention ? I want something which is batch file that will install firefox addon ( I created ) silently. Best Firefox Add-ons for Web Developers This is where Firefox truly shines. NoScript, Firebug, and other popular Firefox add-on extensions are opening millions of end users to a new type of attack that can surreptitiously execute malicious code and steal sensitive data, a team of researchers reported. Mozilla is the not-for-profit behind the lightning fast Firefox browser. Yesware works in the background of the email client you already use so you can stay focused on working smarter. Google Chrome & Mozilla Firefox Browser Extension- VT4Browsers. Add-ons can enhance existing features or add new ones entirely. If you use a url, the comment will be flagged for moderation until you've been whitelisted. So much so that all the major players in the “browser wars” are providing or developing a private browsing mode. Microsoft Disabling add-ons and extensions one at a time is a snap in both Firefox. Click the menu button , click Add-ons and select Get Add-ons Recommendations. Hola VPN is the first community powered (Peer-to-Peer) VPN, where users help each other to make the web accessible for all, by sharing their idle resources. Could you. The Avast and AVG extensions obtained extremely detailed web histories. Firefox Extension. We compile a list of the 26 Essential Firefox Add-ons (along with brief descriptions) that every web designer should know about. Firefoxブラウザにインストール済みのアドオン(拡張機能)が一斉に無効化され、新規にダウンロード・インストールもできなくなる不具合が発生. Mozilla releases Firefox 66. Version Name. Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and then share the results of your research. Learn about more features and get LastPass for Internet Explorer, Firefox, Safari, and Opera from www. The problem is being caused by security certificate expiring. Firefox is not allowing users to install any of the listed add-ons due to a certificate issue, Mozilla confirmed in a forum post. The Best Firefox Add-ons for Firefox Quantum. The Avast and AVG extensions obtained extremely detailed web histories. This at least in Firefox 70. Try Chrome, Google's fast modern browser, to get all of the features of Toolbar and more. Cooliris started off as a simple Firefox extension known as PicLens which enabled you to view online photos in a full screen slideshow. Access the Options - Customizing - Toolbars - Themes. A collection of firefox addons programs for Windows 7, Windows 8 and Windows 10 along with software reviews and downloads for 32-bit and 64-bit titles. Locate the extension file on your computer and drag the file onto the Extensions page. OS Supported. so you should start working right now. Have you wanted an Add-on in Firefox? You've come to the right place. Check links and files with VirusTotal's free and easy service. Best Firefox Add-ons for Web Developers This is where Firefox truly shines. Untl recently, Firefox was the browser of choice for most hackers because of its plug-in friendly design. Thus, I've ended support / development of the addons. Mozilla has wiped 23 extensions from its directory of Firefox browser add-ons after finding inappropriate functions in the code. com, your trusted source for the top software picks. Autofill Forms enables you to fill out web forms with one click or a keyboard shortcut. While using Firefox add-ons to download YouTube videos, you may be confronted with different problems. Secure Login is a login extension for Mozilla Firefox integrated password manager. This article focuses on the best Mozilla Firefox extensions that will make your browsing experience stress-free, safe and secure. In 2017, Mozilla enacted major changes to the application programming interface (API) for add-ons in Firefox. See also: Validating a DOM with Google Chrome. Firefox Sync is a service that lets you synchronize your bookmarks, history, passwords, add-ons and open tabs with another copy of Firefox – like one on another computer or on a mobile phone. Extensions expand the capabilities of the browser, themes allow you to personalize Pale Moon's visual aesthetic, and plugins further extend the browser with specialized external components such as the Adobe Flash Player. From a report: The add-ons have been banned and removed from the Mozilla Add-on (AMO) portal to prevent. Go to the Mozilla home page (link at bottom. These addons can also help in extracting audio from an FLV video file. This is an outdated version compatible with Firefox 1. In Firefox, go to ≡ > Add-ons. Firefox Add-on Options. Click "Remove" ("Uninstall" in Firefox. The "Manage Add-ons" option on IE's Tools menu is grayed out when you open the browser with all add-ons disabled. Easily sign in to sites, generate passwords, and store secure information, including logins, credit cards, notes, and more. 4, properly addressing a problem that prevented add-ons from working in the web browser. How do I resolve the problem?. Its main feature is similar to Opera's (the browser) Wand login. Click "Remove" ("Uninstall" in Firefox. Check out what s new and known issues for this version of Firefox below. Click "Remove" ("Uninstall" in Firefox. This at least in Firefox 70. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. Using the WAVE extension. Is there anyway to transfer just the addon to a fre Firefox Addon Solved - Windows 10 Forums. Free and safe download. Tamper Data Tamper data is a great tool to view and modify HTTP/HTTPS headers and post parameters. Adblock Plus, the most popular ad blocker on Firefox, Chrome, Safari, Android and iOS. * and earlier, we provide the link to download ImTranslator v. Click the ellipsis (3-dot) icon for the extension you wish to remove and select Remove. Google Chrome Addons, Tips, and Tutorials. Firefox preview is a separate application from the current Firefox. x Addon to allow you a direct interaction with Linkman in the browser. Download Videos and Music from the Ok. org? A news story from the New York Times or a book from a library? Zotero has you covered, everywhere. sandbox_enabled) that can be set to false to allow the CCK2 to work. Free addons for IceCat Warning : this page has been deprecated in favor of two pages in the Free Software Directory: GNU IceCat's own entry and the IceCat extensions project page. Secure Login is a login extension for Mozilla Firefox integrated password manager. [FIXED] Certificate issue causing add-ons to be disabled or fail to install: May 5, 2019: We released Firefox 66. Mozilla Firefox is a fast, full-featured Web browser. Sign in - Google Accounts. Desktop Firefox Browser with Flash Player, Java, Extensions, Add-Ons; running in a cloud-hosted virtual service. Need an article from JSTOR or a preprint from arXiv. Home; Albums. If the Page Info window is broken after installing the extension then try another conversion with this option disabled. It has been developed two new add-ons able to query directly on a database at runtime to fill in "possible values". There are two fixes for the add-ons disabled in Firefox problem. The Windows Presentation Foundation (WPF) plug-in for Firefox and the. There are a number of Add-ons available for just about any type of web development, and added bonuses like direct FTP capabilities within the browser!. As always, you re encouraged to tell us what you think, or file a bug in Bugzilla. Windscribe Addon Firefox Android Super Fast Speeds> Windscribe Addon Firefox Android Stop Pop-Ups> Torrenting Allowed - Get Vpn Now!how to Windscribe Addon Firefox Android for Hide your identity and browsing activity; Access websites and Windscribe Addon Firefox Android platforms blocked by the 1 last update 2020/01/15 Thai government. Press FireFox options button (arrow 1 on the image) and then on "Add-ons" menu item (arrow 2 on the image). Need an article from JSTOR or a preprint from arXiv. Stylish is a Firefox addon that allows users to easily apply, remove and manage these custom user styles, many of which can be found in Stylish's companion site, userstyles. This article briefly explains how it all works and why you'd want to use it. Thousands of online trackers are following you every day, collecting information about where you go online and slowing down your speed. com, your trusted source for the top software picks. Enter accents, diacritics, diaeresis, umlauts, ligatures etc. Classic Add-ons Archive About. Mozilla has acknowledged an issue with its Firefox browser that has caused add-ons to become disabled or fail to install altogether. IDM integration guide for Firefox. Usa el motor Gecko para renderizar páginas web, el cual implementa actuales y futuros estándares web. And it gets worse. Firefox will inform you the add-on was installed successfully, and 1Password's button will now appear in Firefox's toolbar. Firefox Add-ons Installation Guide. But the best way? Use private browsing and none of cookies traces should retrieve. In order to protect Firefox users from malicious add-ons, Mozilla has banned extensions that contain obfuscated code. 0 Top 3 Firefox Add-ons To Download YouTube Videos. Firefox Extension. You are probably reading this article, because you want to cleanup some of your add-ons in Firefox. org prior to this purge by the company. Sections of this page. ChatZilla works on the latest versions of SeaMonkey and the Mozilla Suite and versions of Mozilla Firefox up to 56. 0 License, and code samples are licensed under the Apache 2. Firefox has a massive community behind it and a result many add-ons have been created to aid with specific interests of users. CSS Scan runs on the browser as an extension so it works on any website. Released Date. How do I resolve the problem?. Add-on is the Mozilla term for software modules that can be added to the Firefox web browser and related applications. Yesware works in the background of the email client you already use so you can stay focused on working smarter. This article briefly explains how it all works and why you'd want to use it. Thunderbird Firefox Add-on Archive This archive contains various (but not all) older style add-ons compatible with Waterfox. Firebug ushered the Web 2. ScrapBook is a Firefox extension, which helps you to save Web pages and manage the collection. If you are writing a new extension, use WebExtensions APIs. ImTranslator v. Disabling and removing themes. This at least in Firefox 70. Pale Moon Add-ons Site What are Add-ons? Add-ons let you customize Pale Moon with extra functionality or a different look. Installing the Pocket browser extension installs buttons that let you save items or view your list with one click. Theming experiment for Firefox Quantum and beyond. And it gets worse. addons shortcut management. The add-on for the catalogue is called Classic Add-ons Archive. Cooliris started off as a simple Firefox extension known as PicLens which enabled you to view online photos in a full screen slideshow. Hola VPN is the first community powered (Peer-to-Peer) VPN, where users help each other to make the web accessible for all, by sharing their idle resources. All you need to do is specify which sites to block and when to block them. The current version of the catalog lists 16706 Firefox add-ons that developers created over the past 14 years based on Firefox's XUL/XPCOM technology. Locate the extension file on your computer and drag the file onto the Extensions page. Thus, I've ended support / development of the addons. Firefox Add-on Options. We are listening!. While using Firefox add-ons to download YouTube videos, you may be confronted with different problems. Classic Add-ons Archive About. Get Firefox for Windows, macOS, Linux, Android and iOS today! Get the latest Firefox browser. Mozilla Firefox is arguably the best browser available that combines strong privacy protection features, good security, active development, and regular updates. The add-on for the catalogue is called Classic Add-ons Archive. Until now, add-on developers had free rein to change. Mozilla Firefox addons or extensions are programs that can be installed into Firefox in order to change the browser's functionality. Add-ons also occasionally. The Google Analytics opt-out add-on is designed to be compatible with Chrome, Internet Explorer 11, Safari, Firefox and Opera. How to Uninstall Firefox Addons. All your purchases are backed by our 14-day refund policy. Check links and files with VirusTotal's free and easy service. And while Google Chrome may grab headlines for its excellent extensions (including the fake ones ), Firefox takes a back seat to no one in the browser plug-in department. This is problematic since in different versions of Firefox, different things work and at some nothing work. One of the most impressive features found on both of those web browsers is the amount of available free extensions or add-ons that you can download and install to modify the existing behavior of the browser or even add new features such as a FTP client (FireFTP), download manager (DownThemAll!), or advertisement blocker. Mozilla Firefox is one of the under-rated web browsers. If left on default, ProCon limits itself to filter pages containing explicit content automatically, based on the text. The Windows Presentation Foundation (WPF) plug-in for Firefox and the. Secure Login is a login extension for Mozilla Firefox integrated password manager. The current version of the catalog lists 16706 Firefox add-ons that developers created over the past 14 years based on Firefox's XUL/XPCOM technology. Conveniently use the same set of favorites and the same convenient user interface in all of your browsers - IE, Firefox, Chrome and Opera!Note: you need setup additional program except addon. Need a Replacement Firefox Addon: Check Out Our Guide Here. Switch to the latest version of Firefox and see the very latest devtools updates. Released Date. The "Manage Add-ons" option on IE's Tools menu is grayed out when you open the browser with all add-ons disabled. Thunderbird Firefox Add-on Archive This archive contains various (but not all) older style add-ons compatible with Waterfox. org (AMO) website then please file an issue on this project. Electronic. org? A news story from the New York Times or a book from a library? Zotero has you covered, everywhere. Unfortunately, I've forgotten the name of the add-on which will automatically feed the next page when I get to the bottom of a list of items, such as in a google search, which goes one for pages. In order to protect Firefox users from malicious add-ons, Mozilla has banned extensions that contain obfuscated code. If you think you agree with the list, comment below. How do I resolve the problem?. Updates to the WAVE extension will automatically be sent to your browser when they are made available. Navigate to Start > All Programs > Mozilla Firefox ( Safe Mode) Note that if you start Firefox through start menu, it won’t ask which options to disable, if you want to disable some items and enable the rest of them use the run command method. Send to Kindle for Mozilla Firefox Sending web content to Kindle has never been easier. It comes with great privacy controls. Firefox said it had disabled the IDM extension because it wasn't compatible. NoScript is a security add-on for Firefox that aims to prevent auto-executing plugins that could put you at risk of malicious scripts, clickjacking and attacks. Be sure and let us know if we have missed anything!. Navigate to the Firefox Add-ons and search for Zoom Scheduler. This is problematic since in different versions of Firefox, different things work and at some nothing work. Google Chrome and Mozilla Firefox are the most used web browsers today. 03/30/2017; 2 minutes to read +7; In this article. Switch to the latest version of Firefox and see the very latest devtools updates. Add-ons for Mozilla Firefox can be disabled or removed by clicking on the Menu button on the toolbar and going to Add-ons. Here are the top 8 YouTube to MP3 Add-ons for Firefox for your reference. Once add-ons were signed, users would need to get a new add-on. Javascript & Firefox Projects for ₹1500 - ₹12500. Firefox Rank Checker Extension Advanced Features: This free rank checking tool allows you to check your rankings in Google, Yahoo!, and Microsoft Live search results, and has the following features: International: in the options section (mentioned above) you can select to pull results from international versions of Google and/or Google. We scoured Firefox's repository for add-ons and selected those with the most users and top reviews. The OpenKM works well with Internet Explorer, Firefox, Opera, and Safari as it based on Web 2. All these takes place within quick succession. Check links and files with VirusTotal's free and easy service. 6 on a MacPro 2010. Here you can find our Chrome, Firefox and Opera Addon which give you the opportunity to convert and download your videos even faster and easier. You are probably reading this article, because you want to cleanup some of your add-ons in Firefox. Firefox will disable add-ons that cannot be validated. Firefox Quantum is the biggest update to Mozilla's browser since its launch in 2004, and introduced a totally new way of handling add-ons. To run a WAVE report, simply click on the WAVE icon to the right of your browser address bar. Thus, I've ended support / development of the addons. We need to have Gecko Driver to run our scripts with the updated Selenium. addons shortcut management. The Autoconfig file it generates will work with the Firefox ESR and with any version Firefox through 62 on Rapid Release. Released Date. HTTPS Everywhere is a Firefox, Chrome, and Opera extension that encrypts your communications with many major websites, making your browsing more secure. FoxyProxy sells reliable, fast, secure VPN and proxy servers in 110+ different countries with 6 ways to connect. 0) was a long term recommended add-on, too, and I am happy that the WebExtension now is as. To run a WAVE report, simply click on the WAVE icon to the right of your browser address bar. Each of these add-ons can be found through the Mozilla Firefox add-ons page, or through the links provided below. Alternatively you can find the shortcut of Firefox to load without addons in start menu. org, commonly known as "AMO", is Mozilla's official site for Firefox and Thunderbird add-ons. When Firefox 53 is released, Firefox Portable stable will match it and Firefox Portable ESR will be bumped up to 52. Classic Add-on Archive Extension. All your purchases are backed by our 14-day refund policy. From funny videos to health, reviews, how-to tutorials and lectures for school learning. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. Using four Firefox add-ons and one GTK theme, you can give Firefox an extreme makeover. After 13 years and 25 million downloads later, Firefox has officially removed FireFTP and FireSSH support from the browser. Classic Add-ons Archive About. FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers. There is a preference (general. Classic Add-Ons Archive is a new add-on for the Firefox web browser that can be best described as a local catalog of classic Firefox add-ons. Sections of this page. A collection of firefox addons programs for Windows 7, Windows 8 and Windows 10 along with software reviews and downloads for 32-bit and 64-bit titles. Starting from Firefox 53, no new legacy add-ons will be accepted on addons. xpi and place it in an extensions folder. Firefox add-ons can stop working at any time for a variety of reasons. This article focuses on the best Mozilla Firefox extensions that will make your browsing experience stress-free, safe and secure. If you are running Firefox versions 57 - 60: Install this extension to resolve the expired security certificate issue and re-enable extensions and themes. If you are searching for an AddOn to make your web browsing experience super faster and secure, then Disconnect is the best AddOn available for your Firefox browser. Conveniently use the same set of favorites and the same convenient user interface in all of your browsers - IE, Firefox, Chrome and Opera!Note: you need setup additional program except addon. The Extension Room is closed. The Avast and AVG extensions obtained extremely detailed web histories. This page describes an easy way to validate HTML documents using CSS HTML Validator and Firefox. Though the new version has more features, Mozilla Firefox still has a demerit i. Firefox has a massive community behind it and a result many add-ons have been created to aid with specific interests of users. 4 for Desktop and Android, as well as Firefox 60. The Web Developer extension adds various web developer tools to a browser. Once add-ons were signed, users would need to get a new add-on. Click Add to Firefox. Scroll through the list of extensions. I have found a way to stop Firefox update checking, update downloading and update notifications once and for all without changing preference settings, altering about:config, creating policy files, or mucking around in the console. Firefox is a popular multi-platform web browser developed by the Mozilla Community and backed by the Mozilla Corporation. Firefox is well known for its large library of add-ons which can be used to add new features or modify the behavior of existing features. If the Page Info window is broken after installing the extension then try another conversion with this option disabled. Download and install the best free apps for Firefox Add-ons & Plugins on Windows, Mac, iOS, and Android from CNET Download. The Jet Propulsion Laboratory is the lead U. Simply follow the steps below and in no time you'll be using your new extensions and themes. Five great Firefox privacy add-ons. org/de/firefox/addon/easly-preisvergleich-assistent/ Im heutigen V. Richard Lawler, @Rjcc. Click the icon again or refresh the page to remove the WAVE. CSS Scan runs on the browser as an extension so it works on any website. Firefox problems with add-ons & plugins. org? A news story from the New York Times or a book from a library? Zotero has you covered, everywhere. In order to protect Firefox users from malicious add-ons, Mozilla has banned extensions that contain obfuscated code. Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product. ScrapBook is a Firefox extension, which helps you to save Web pages and manage the collection. Here are some WebExtensions you can install to replace the functionality of your favorite dead add-ons. Firefox Addon Maker. With the release of Firefox Quantum, it is slowly capturing the web browser's market share. Internet Explorer Browser Extension- vtExplorer. Many add-ons provide additional options and preference settings. Firefox 37. Understanding the common. I recommend switching to Waterfox to continue using the addons. Add-ons also occasionally. Free music site The Most Complete Mp3 Mp4 Song & Video Download Center. One of the more popular hacker tools for older versions of Firefox was an add-on called Tamper Data. This catalog contains 93,598 versions of 19,450 Firefox add-ons created by 14,274 developers over the past 15 years using XUL/XPCOM technology before Mozilla decided to ruin the classic extensions ecosystem and go exclusively to WebExtensions. Firefox add-ons with obfuscated code will be banned by Mozilla. Starting from Firefox 53, no new legacy add-ons will be accepted on addons. Click the Add to Firefox button and allow it to be installed. There is a preference (general. Mozilla releases Firefox 66. 6 through the Control Panel in the Start Menu on Windows, by removing the Firefox application on OS X, or by removing the firefox folder on Linux. ru Supports all available video qualities for Odnoklassniki 240p, 380p, 480p, 720p, 1080p. Believe it or not, we really ran Windows Update from Mozilla/Firefox. check your task manager firefox sometimes opens multiple times and freezes the computer. Mozilla has acknowledged an issue with its Firefox browser that has caused add-ons to become disabled or fail to install altogether. Below is a listing of our top 10 favorite Firefox add-ons and extensions. The Hacker's Browser. Most stuff works, but the port to Firefox remains a work in progress. If you want to opt-out, download and install the add-on for your web browser. Firefox has tons of useful add-ons that can make your browsing safer, use less bandwidth, grab screenshotsyou name it, there's probably an add-on for it. Click the menu button , click Add-ons and select Extensions. In the past, there were several toolsets for developing Firefox extensions, but as of November 2017, extensions must be built using WebExtensions APIs. Firefox is well known for having great add-ons. Using the WAVE extension. 0 Top 3 Firefox Add-ons To Download YouTube Videos. Key features are lightness, speed, accuracy and multi-language support. Firefox sends data about installed addons as metadata updates, so Mozilla is able to recommend you other addons. A group of researchers from Northeastern University have detailed a new method that allows malicious actors to launch stealthy attacks by leveraging the lack of isolation between Firefox add-ons.