Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
3.065 utents
Google Analytics Debugger
Prints useful information to the JavaScript console by enabling the debug version of the Google Analytics Javascript. P.S: this add-on is migrated from Chrome store.
3.039 utents
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
3.022 utents
Basic JSON Formatter
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.
2.940 utents
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
2.913 utents
Print for Firefox
Print the current page you see with one single click. That for all kinds of photo printing, poster printing, business cards, etc. Print today a web page, photo or business card with your own favorite Print button.
2.795 utents
dataslayer
Debug and test tag management (Google Tag Manager, Adobe Launch / DTM, Tealium) and analytics (Google Analytics, Adobe Analytics) implementations from within Developer Tools.
2.759 utents
Color Picker For Firefox
HEX Color Picker, RGB Color Picker, Color Picker EyeDropper, Pick color from web page (Color Picker For Firefox)
2.735 utents
Try XPath
This add-on displays the result of evaluating XPath expression or CSS selector.
2.732 utents
Signer.Digital Digital Signature, PKI
Signer.Digital - Digital Signing of eReturns, PDF Signing and Web User Auth, RSA Encryption/Decryption. JULY 2022 - Added support for ICP-Brazil and ITIDA Egypt.
2.714 utents
webhint
Check for best practices and common errors with your site's accessibility, speed, security and more.
2.684 utents
Merge Windows
Merges the tabs from multiple windows together into one window. Extension won't show context menu item when there aren't more than one window of the same type to merge together. Private windows will only merge with private windows not normal.
2.641 utents
Salesforce Inspector reloaded
Productivity tools for Salesforce administrators and developers to inspect data and metadata directly from the Salesforce UI.
2.582 utents
HackTools
Hacktools, is a web extension facilitating your web application penetration tests, it includes cheat sheets as well as all the tools used during a test such as XSS payloads, Reverse shells to test your web application.
2.544 utents
