Add extensions, get work done

Google Lighthouse

Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.

Text Link

Allows URI texts written in webpages to be loaded by double clicks.

A REST client for the rest of us

Yandex Search

Adds Yandex for search engines

JavaScript Toggle On and Off (WebExtension)

Toggle JavaScript engine on and off the easy way

JSON Lite

Fast JSON viewer - highlights, shows items count/size, handles large files

Allow CORS: Access-Control-Allow-Origin

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

javascript

add javascript that will run on this domain. back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)

Flag Cookies

A cookie, and browser storage manager with cow powers!

Empty Cache Button

Cache clearing made easy. One click.

Header Editor

Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests

IP Address and Domain Information

The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.

Fake Filler

A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.

Modify Header Value

Add, modify or remove a header for any request on desired domains.

polkadot{.js} extension

Manage your Polkadot accounts outside of dapps. Injects the accounts and allows signs transactions for a specific account.

Fonts Ninja

Speed up your design workflow!

RESTer

A REST client for almost any web service.

Smartphone emulator on computer very realistic with several models to test mobile websites.

A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook. Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.

SQLite Manager

manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously

HTTP Header Live

Displays the HTTP header. Edit it and send it.

[No License, FOREVER FREE] A HackBar for new firefox (Firefox Quantum). This addon is written in webextension and alternatives to the XUL version of original Hackbar. You can ask request here: https://github.com/Hack-Free/HackBar

Angular DevTools

Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities.

Export cookies to a Netscape format cookies.txt file.