The easiest way to capture, share, and bookmark from the web.
Saves the current page as image file or copies it to clipboard.
Quickly test out your web pages in Chrome, Edge, Safari, or Opera. Open With opens the current page in your other browsers with just two clicks. Donate here: https://darktrojan.github.io/donate.html?openwith
Edit cookies related to the current page and all its sub-frames right from a popup
This add-on displays the result of evaluating XPath expression or CSS selector.
Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements. (This is primarily a Chrome extension, so it's a bit glitchy due to Firefox's inexact implementation of the APIs.)
An indicator showing the HTTP version used to load the page in the address bar.
Blocks the ”seen” feature of the facebook messenger, and your friends will no longer be able to see if you read their messages.
No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled
MIDI support for browsers
Productivity tools for Salesforce.com administrators and developers to inspect data and metadata.
Live Reload feature for Dynamic content (PHP, Node.js, ASPNET - Whatever, it doesn't matter). This extension is for Live Server - VSCode Extension (required v3.0.0+).
Adds a page action to pretty-print JSON. Unlike similar extensions, this simply pretty-prints it. It doesn't add any kind of viewer, colors, or collapsing. If you want this to work as expected, disable devtools.jsonview.enabled in about:config.
Harness the power of IPFS in your browser
The extension generates a document-map or index of any web document structured with headings and/or with sections in HTML 5. It shows the headings structure, the errors in the structure (ie. incorrect levels), and it works as HTML5 Outliner too.
Extends the Developer Tools, adding tools for debugging and profiling Angular applications.
Download login-protected files from the command line using curl, wget or aria2.
Firebug extension for web analytics testing and debugging
Selenium IDE alternative to record and export Selenium scripts. Provides reports & screenshots. Fast & open-sourced.
Allows to change the language identifier sent to webservers to whatever language you need.
Elasticvue is a free and simple elasticsearch gui for your browser
Pretty XML is a browser-based XML viewer
Easily draw on any website with simple drawing tools, then print the result.
UI.Vision RPA (formerly Kantu) is open-source Robotic Process Automation (RPA) software for task and test automation. It is 3 tools in 1: Visual web browser automation, Selenium IDE and AI-powered desktop automation for Windows, Mac and Linux.
Go full screen with one click on the full screen button. That includes also the full screen movies such as the YouTube, Vimeo, Dailymotion, Youku video player, etc.