Latest Developer Tools topics - Mozilla Discourse = 40rem)" rel="stylesheet" data-target="chat_desktop" /> = 40rem)" rel="stylesheet" data-target="discourse-ai_desktop" /> = 40rem)" rel="stylesheet" data-target="discourse-events_desktop" /> = 40rem)" rel="stylesheet" data-target="discourse-reactions_desktop" /> = 40rem)" rel="stylesheet" data-target="poll_desktop" /> Developer Tools Topic Replies Views Activity Console.log always return, undefine 5 277 June 2, 2026 How do I turn off autocomplete in the HTML editor? 1 157 March 31, 2026 Alphabetical order of scripts in menu of Debugger feedback 0 104 February 24, 2026 Web developer select element is stuck 8 1417 February 24, 2026 Firefox and memory problems, full 1 129 February 22, 2026 How do I view the Frame rate chart in the performance tool? 3 2254 February 12, 2026 Mobile Version of Firefox Web Developer Edition Browser 1 183 February 5, 2026 How to create geckoview FAT AAR? learning 3 1217 January 18, 2026 How do I debug Firefox on iOS? learning 7 20574 January 3, 2026 How to make the Console automatically scroll? 22 13365 January 3, 2026 Show JavaScript errors 0 49 January 3, 2026 Why does Network tab on Developer Tools not allow some headers? feedback , issue 4 1182 January 3, 2026 New Settings about Auto run DevTools for popups issue 0 53 December 27, 2025 Debugger opening as default on certain websites 1 156 October 29, 2025 TypeError: cyclic object value in har-exporter.js 2 77 October 29, 2025 Camera Permission Issue 1 162 October 23, 2025 DevTools can not see all inherited styles 1 104 October 20, 2025 Question about image fetching in Responsive Design mode 0 98 September 27, 2025 Console.log( array[] ) needs to log value at the time, instead of after 1 127 September 16, 2025 Network tab shows response of redirect instead of response of request! 1 1658 August 25, 2025 Unable to enable Responsive Design Mode in private window issue 2 97 August 14, 2025 Why does div.no-data work in Chrome DevTools but not in Firefox DevTools when using the Ctrl+F search bar? 2 114 August 13, 2025 DevTools styles slow redraws with >100 rule declarations 3 174 August 13, 2025 Easily perform fallback testing for image formats [avif > webp > jpeg] feedback , issue 0 273 August 8, 2025 How to enable console.log from Service Worker? 10 6795 December 18, 2024 Unable to resize developer panels : Wayland 2 186 May 12, 2025 Can I set the font with firefox web developer tools? 11 18145 September 17, 2023 Color Scheme Simulator doesn't work in Inspect Tool for extension debugging? feedback , issue 3 160 April 11, 2025 How to revert to old responsive design? 3 2239 February 4, 2018 Developer tools for element put in sull screen 6 193 March 25, 2025