HTTP request maker
Displays a sidebar that lets you to forge HTTP requests. Press Alt+Shift+Y to show the sidebar and make your own HTTP request. You can choose the method GET, HEAD, POST, OPTIONS, PUT DELETE and the body data to send. Response in the main window.
2,980 人のユーザー
CookieManager - Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
2,912 人のユーザー
ffCK Overlays
Right-click any element to remove it. Inspired by the Chrome extension "F*ck Overlays".
2,854 人のユーザー
Omnibug
The leading browser extension for analytics and marketing technology testing and debugging
2,846 人のユーザー
PoE Overlay: Dash
Share your current session on pathofexile.com with PoE Overlay
2,834 人のユーザー
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.
2,817 人のユーザー
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.
2,803 人のユーザー
FirePHP
Log from PHP to a devtools panel.
2,776 人のユーザー
Print for Firefox
Print the current page you see with one single click. And that for all kinds of photo printing, poster printing, brochure printer, newspaper printing, business cards and more.
2,767 人のユーザー
Jazz-MIDI
MIDI support for browsers
2,688 人のユーザー
Color Picker For Firefox
HEX Color Picker, RGB Color Picker, Color Picker EyeDropper, Pick color from web page (Color Picker For Firefox)
2,659 人のユーザー
Screenshot Full Page
Take screenshot of entire webpage with single click.
2,634 人のユーザー
Try XPath
This add-on displays the result of evaluating XPath expression or CSS selector.
2,576 人のユーザー
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.
2,572 人のユーザー
webhint
Check for best practices and common errors with your site's accessibility, speed, security and more.
2,565 人のユーザー
Easy Auto Refresh
Auto-refresh and auto-reload pages after any number of seconds.
2,525 人のユーザー
dataslayer
Debug and test tag management (Google Tag Manager, Adobe Launch / DTM, Tealium) and analytics (Google Analytics, Adobe Analytics) implementations from within Developer Tools.
2,520 人のユーザー
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.
2,519 人のユーザー
SN Utils
ServiceNow Productivity tools. (Personal work, not affiliated to ServiceNow)
2,457 人のユーザー
View Page Source
View the source code of a page with the click of a button.
2,457 人のユーザー
VisBug
Open source browser design tools
2,442 人のユーザー
Wizdler
Parses the WSDL files and generates SOAP messages for you.
2,437 人のユーザー
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.
2,432 人のユーザー
Clockwork
php dev tools integrated to your browser
2,429 人のユーザー
Pesticide
This extension inserts the Pesticide CSS into the current page, outlining each element to better see placement on the page.
2,415 人のユーザー