Test any website performance with main test tools with one single click: Google PageTest Insights, GTmetrix, Yellow Lab Tools
The polymer redesign of YouTube has made the site very slow for Firefox users. This add-on adds the "disable_polymer" option to YouTube URLs in order to revert back to the old classic design.
An easy to use screen color temperature addon!
Allow the user to search selected text on a webpage directly on Jisho dictionary
Add subtitles to any HTML5 video sites such as Youtube, Netflix, Amazon Prime Video, Disney+, HBO Max and other stream sites.
Rotate the entire page or rotate fullscreen view to best fit the device aspect ratio
Easily copy the selected text without formatting to the clipboard via right-click menu.
Press (command or ctrl)-shift-o to sort all the tabs alphabetically by URL , the button in the toolbar, the toolbar context menu or the tools menu items.
Repeat, speed up, slow down Youtube and any HTML5 video. Create a loop with accuracy to milliseconds. Create mixed playlists.
Enhances the Google Play Store™ with various features.
Easily view and edit cookies for any website via toolbar popup!
Set your open tabs aside and store them for later.
They will be stored in a new folder in your bookmarks and can be restored all at once via the sidebar.
https://github.com/tim-we/tabs-aside
A WebExtension that redirects the mobile Wikipedia website to the standard, canonical domain.
This extension will redirect the first request, and then set a "stopMobileRedirect" cookie to prevent future redirects.
Adds new features and builds fare purchase links for ITA Matrix
Shows Trello card IDs for use in commits and for other quick references. Copy the ID to the clipboard by clicking on it.
Online harassment is a problem. The solution? People being less terrible. Until then, this extension replaces "bitch" and other derogatory words like it with "boss" all across the internet.
Navigate up one or more URL levels, using the toolbar button, context menu or keyboard shortcut.
Summarize your articles online in 1 clic
Plain Text or Regular Expression Find and Replace Text on Web Pages
This mirror flips your online activity!
A two-panel bookmarks manager which is similar to the well-known Total Commander.
Click on any element to get the font info in a page popup
Customize the visited link color for google search results.
Resize the current window into different customizable layouts (Multiple monitors are supported).
Add Persistent Sticky Notes anywhere on any web page, they will reappear when you re-open the page
A simple random password generator for Firefox browser
Use a black page as your new tab page.
The plugin that changes the theme of messenger.com to dark.
You can support me here: https://www.paypal.me/marcinkiewiczk
When viewing an image on Tumblr, loads the original raw image instead of the default lower resolution.
Easily find and set free VPN proxies and, browse fast and secure!