Chrome Sniffer Plus - Sniff web framework and javascript libraries run on browsing website.
Clear Cache - Clear your cache and browsing data with a single click of a button. Better when shortcut set up
Emmet Re:View - Fast and easy way to test your responsive design in multiple viewports
Live Reload - Provides Chrome browser integration for the official LiveReload apps (Mac & Windows) and third-parties like guard-livereload and yeoman.
JSONView - Validate and view JSON documents
Page Ruler - Draw a ruler to get pixel dimensions and positioning, and measure elements on any web page.
Pesticide - This extension inserts the Pesticide CSS into the current page, outlining each element to better see placement on the page.
React Developer Tools - Adds React debugging tools to the Chrome Developer Tools.
Wappalyzer - Identifies software on the web. Works well in tandem with Chrome Sniffer Plus
Visual Event - Know what event is bound on each DOM element.
WAVE Evaluation Tool -
Evaluate web accessibility within the Chrome browser.
WhatFont - The easiest way to identify fonts on web pages.
Zoom Text Only - Zoom text without distorting the images
Window Resizer - Resize browser window to emulate various screen resolutions
[Palette Creator](https://chrome.google.com/webstore/detail/palette-creator/oolpphfmdmjbojolagcbgdemojhcnlod/related(https://chrome.google.com/webstore/detail/palette-creator/oolpphfmdmjbojolagcbgdemojhcnlod) - Creates a color palette from any image. Just right-click on the image and select the “Palette Creator” option.
PHP Console - Display PHP errors & vars dumps in Google Chrome console and notification popups, execute PHP code remotely.
AJAX Debugger - Logs all AJAX activity to the Dev Tools Console, allowing inspection of AJAX calls, and open calls in new tab with all the inputs.