On ANY web site, easily find/edit the web elements and styles that you need, in real time. Use css playground to micro-view 100's of styles in seconds.
NOTE: Use your shortcut key "f" allot.

Create test scripts to run in Loadster and Speedway.

Capture video from canvas elements

https://youtu.be/pUEkz9HSty8 -- usage instruction. The most simple to use autoclicker... Literally, I made this because I couldn't find a good one :D

Allow Right click, Allow copy, Selection on web sites that prevent it

Shows the site's IP address in the browser's address bar. Just hover your mouse over the icon to display it or click to copy.

Load your website's desktop and mobile views effortlessly in Adobe Target with the VEC helper extension

Open current page, link, or all tabs in the Yandex browser.

Website analysis & SEO tool by iwebchk provides comprehensive website review in SEO, performance, validity, security, accessibility, social media, backlinks, visitors, technologies and usability.

Edit text in your favourite external editor!

Copy a Material Design Color in one click in either #HEX, HEX, RGB and RGBA format.

Switch Direction in edits, useful for mixed RTL and LTR texts editing.

A browser extension for Chrome, Opera & Firefox that adds Mermaid language support to GitHub.

Based off cookies.txt at https://chrome.google.com/webstore/detail/cookiestxt/njabckikapfpffapmjgojcnbfjonfjfg?hl=en

Format Text, Replace, Insert HTML, BBCode, Markdown & Custom Texts

This extension open the current GitHub project on Sourcegraph.

When activated, CSS Layout Debugger applies dynamic backgrounds and outlines to elements on the page in order to assist in layout debugging.

LocaProxy Toolbar is a free proxy manager and switcher for Firefox.

HTTP Header Mangler inserts HTTP headers on a per host basis.

Empathy test for color blindness and visual impairment. This add-on emulates 8 types of color blindness, plus grayscale to check the contrast of your website.

https://vinceumo.github.io/A11Y-Color-Blindness-Empathy-Test/

Browser extension to copy hyperlinks, images, and selected text as Markdown

Select and remove annoying or unnecessary elements from a page.

Great for printing and readability.

Provides quick access to
1. indexed pages
2. Whois info
3. archive.org result
4. robots.txt & sitemap
6. Backlinks
7. Seo/Security report
8. Social media report
9. Alexa rank
10. Google cache
11. Similar web sites
12. ip neighbors

A web extension for firefox allowing to view multiple view widths at once. Inspired by Emmet Re:view

Converts Current URL to QRCode.

A sync-able open-source two-factor authenticator

A basic add-on. Gets rid of a current site's cookies. Repository: https://github.com/MARNUTUX/lympha-cookies

Send a message to a native application for authentication.

Change the instagram background to dark theme.

This extension helps you find, inspect, export, and view XML Sitemap files for any site you navigate in a browser.