Developer Tools


Topic Replies Activity
Getting started with Firefox DevTools

Welcome! This forum is for discussing Firefox’s built-in developer tools which are used for inspecting and debugging websites. Check out firefox-dev.tools for more about our community and ways to get involved. Brush up…

2 April 20, 2018
Why are getNativeDataPropertyPure, NativeSetProperty etc so expensive? 1 June 24, 2019
Firefox Developer tools Network XHR Parameterse scroll problem 1 June 24, 2019
Can't set Debugger breakpoints 6 June 23, 2019
Javascript jerky mouse event rendering on canvas, but smooth when web development tool is on 1 June 14, 2019
Web console request details Response tab - duplicate scrollbars 1 June 13, 2019
debbuger javascript, when it shows errors in console, does not show the line. 2 June 12, 2019
Feedback wanted: Inspector Navigation 3 June 7, 2019
Pasting big JSON into the firefox webpage inspector's js console is incredibly slow 6 June 6, 2019
How can I debug the downloaded webpage instead of the attempted download of the source? 3 June 6, 2019
Word wrapping on Response Payload? 1 June 5, 2019
Ability to view websocket data in network tab 2 May 30, 2019
Kotlin sourcemap debug support 2 May 30, 2019
Can I set the font with firefox web developer tools? 3 May 29, 2019
Need Help Removing Permanent Mozilla Bot Attached to My Mac Home Screen 3 May 27, 2019
How to test preferred color scheme (Dark Mode) with Firefox 2 May 24, 2019
Add-ons remote debugging 9 May 24, 2019
Cannot copy responses from Network tab 4 May 21, 2019
Side by Side panels 2 May 20, 2019
Major performance problems 7 May 20, 2019
Profile Problem Developer Edition 68.0b1 2 May 17, 2019
Make F8 button work when devtool is not focused 2 May 17, 2019
Firefox 60.0b10 Developer Tool:Network 3 May 16, 2019
Network Tab: how does "Modify and Resend" feature work? 3 May 16, 2019
Network tab column widths 4 May 16, 2019
Necessity of Folding a single HTML-Element 2 May 15, 2019
Debugger window empty in Firefox Quantum 67 10 May 4, 2019
Press Delete to remove individual cookie 4 May 1, 2019
Raw mode on form data params 4 April 30, 2019
Editing Variables in the New Debugger 2 April 29, 2019