Firefox OS Simulator is a test environment for Firefox OS. Use it to test your apps in a Firefox OS-like environment that looks and feels like a mobile phone. After installing it, go to Web Developer > Firefox OS Simulator to access its features.
Quickly and easily switch between popular user-agent strings.
Automatically play YouTube videos in HD or any other preferred format, and disable autoplay for videos loaded in background tabs.
YouTube video player sucks a lot, this basic video player sucks less
NOTE: this extension will be deprecated in favor of "HTML5 Video EveryWhere" extension
Fastest Weather Forecast is the easiest way to check the weather while you browse internet
PDF.js brings Portable Document Format (PDF) reading capabilities to your browser using web standard technologies.
Please report issues to: https://github.com/mozilla/pdf.js/issues
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Control what gets sent as the HTTP Referer on a per-site basis.
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.
WebRTC exposes your internal network IP(s), without user interaction.