All Products Community Forum

Several weeks ago Firefox worked normally for me. I left for most of the day and when I got home Firefox no longer worked at all. Everything on my home page was gone and when I typed in websites - such as my e-mail program or Facebook, nothing ever came up. I'm not super browser savvy, but I opened the menu and under help was "trouble shooting mode". I didn't know what that was but figured nothing much more could go wrong with Firefox, so I chose that. I had to rebuild the websites I had in a row on the middle of the page. I didn't lose bookmarks, but everything else was different. So I left it that way.

Earlier today, Firefox wanted me to do another update. I thought maybe by agreeing to that, things might return to normal. Noooooooo. It's no better whatever. Now I don't know how to get out of troubleshooting mode to know if anything will work normally again.

I am seriously considering switching browsers, but I have a LOT of stuff bookmarked and that would be very intensive to build all those book marks in another browser.

This problem just began today on my Win 11 laptop. Firefox is current - 139.0.4. Win 11 is current. No new software has been installed. Firefox hangs up and will not move. Task manager shows FF is consuming more than 90% of my 16GB memory. I must end the FF task to get up and running again.

Hi, when I use YouTube.com and i find this on "https://www.youtube.com/results?search_query=blue+connection+touch+the+sky" I get this popup message ""This page is slowing down Firefox",etc.etc. What happened to the browser? Thanks!

im using firefox on ubuntu, version 139.0.4. when i browse the internet using firefox, every some time the toolbar and the search bar "freeze" - i am unable to click anything, from the url, to any of the buttons. it takes up to like 1/2 minutes for the search bar and the toolbar to work again. i never had this issue before, neither on ubuntu (and other linux distributions), nor on windows...

Full Blank screen when opening new tab or webpage Does this intermittently, at least once per day. Recovery is to clear all active apps from memory, then reopen Firefox; previouse tabs are present.

No relation to number of tabs open or number of other apps open.
This problem has persisted for at least 2 FF build updates.
 It is NOT A MEMORY ISSUE, I checked last failure

3.8gb in use out of 8gb!

Using Android 13. Firefox: 139.0.4 (Build #2016095887), hg-3825afc77e5b+ GV: 139.0.4-20250609112858 AS: 139

I have duck duck go set as my search engine on my galaxy S10+. At some point my Firefox browser updated and now every time I search something, or load any page within the search engine I get a forced web page refresh when trying to scroll down the results page or any page. If I hold my thumb down on the screen and slowly slide it upwards it backs off the refresh gesture and then everything works fine. I have switched search engines, so I know it's not the search page itself, and it only happens in Firefox. I do have 100 tabs backed up but I've tried uninstalling and reinstalling Firefox and starting new but it doesn't matter. Firefox still forces a refresh when I try to scroll down. I've become so frustrated with this that I installed brave browser today to see if that browser did the same thing and it does not, so until I can get some help fixing this I will be switching to brave browser from here on out. Attached is an example after I searched the term "searching the web" it did not have an issue scrolling on the results page, but then I clicked on images and tried to scroll and as you can see it is trying to refresh the page.

I've had this issue for years, but it was always something I could live with. The Issue would only appear once every week or so. However, recently the issue seems basically happen on a daily basis.

After Firefox has been running for some time and there's a few other tabs open, The YouTube UI will periodically become completely unresponsive.

Just moving the cursor on top of Youtube will cause 100% + CPU in the Firefox task manager and the page is entirely unresponsive during that time (except video playback)...

This issue has persisted through reinstalls, new profiles and is also present without extensions.

This is a performance Profile of the Issue: https://share.firefox.dev/4kNlhKD

Any tips on how to maybe diagnose this are very much appreciated!

I can't reproduce it, but sometimes the URL bar becomes unresponsive. You click on it and nothing appens. I've tried to delete cache and history, but nothing changes.

Hi I’ve been a dedicated Firefox user since as long as I can remember across all my devices. Since buying an iPad Pro and setting up with Firefox, as I have on all my devices, on the iPad Firefox performance is really poor. Websites often freeze and downloading pdfs from websites or from SharePoint etc. often does not work. An empty file will be saved. When switching to another browser I don’t experience these problems and I have no other software problems on the iPad. Running Firefox 139.1 on iPadOS 18.5 on a 13” iPad Pro M4 (MVX33HC/A)

Can you please let me know what your proposed fixes are for this? Thank you and kind regards Ewald

i dont know if anyone else is having this problem but when using firefox on android the back button gets greyed out and i cant go back it happens randomly and it gets annoying. I hope they find the cause of it and fix it.

Dear FF/Mozella staff,

  I have been using FF for many years with Windows 10, every time I launch FF it starts up, brings me to my start screen of favorites, and then shows itself still downloading on the top taskbar pane, but everything is already loaded on screen. The cursor will then not change to the hand pointer to follow links on screen. the bookmarks open to blank or unresponsive pages. Closing and reopening FF gives the error message that processes are still running and do I want to open a new window with FF, but that is unresponsive as well. 

back to internet explorer, Thanks for that

I am on a MacOS 15.5 and the latest Firefox build. Opening this link https://adobe.ly/444sG14 leads to the heavy stutter of the Firefox window.

Gmail is slower than frozen molasses, it is taking 15 to 20 seconds to respond to mouse clicks and typing as well as scrolling, it takes me more than half an hour to do what should take a few minutes, if this is not fixed soon that will be the end of Firefox for me, I will use Opera instead.

All 4 of my Firefox installations started sucking big time recently. Unbelievably poor performance loading pages, which was working super fast before. Never had such an issue, running on 4 different, high performance PCs and having same symptoms, where I have to wait for Facebooks posts to load for minute or so. Youtube stops playing in the middle of the video. In meantime if I try same pages on other browsers everything works fast AF. I'm on 1000Mbps connection at office and 500Mbps home. Noticed massive increase in RAM usage, which used to be around 3GB, it is now using 6+. What has happened ?

Multiple times a day when switching tabs the entire screen will turn gray and become entirely unresponsive, requiring me to close and restart the app. This has been happening for weeks. It does this regardless of the number of tabs I have open, and continues to do this even after clearing the cache. There is also no report for it in about:crashes.

When the app is going to turn fully grey when opening a new tab when I scroll down and the address bar moves away there is a gray box where it used to be. Also, when opening a new tab the homepage won't appear; there is no "jump back in" or "recently visited" section, just a fully gray background.

Every day gmail goes from moderately responsive to slower than frozen molasses taking 10 seconds or more to respond to mouse clicks and typing which is taking up a lot of my time and will likely result in an ulcer it is so annoying.

Win 11, latest FF version. A few addons, that never cause problems.

Firefox keeps freezing. I've checked Task Mgr, Event Viewer, Troubleshooting - and cannot find out why this is happening.

Restarted 3 times, but when I open outlook.com, the mail freezes. Open tabs keep freezing, so I'm unsure the culprit.