Firefox Community Forum

Since updating to Firefox 141.0 (Win11), I've had issues with performance and on-screen behaviour of dynamic web pages/sites. The problems do not manifest on Chrome, or on a reinstalled version of Fx 140.0.4 on the same computer running at the same time (and with copy of original profile's data files, extensions etc.), they do manifest on a new Firefox 141.0 profile with only one tab open.

The problem happens on dynamic pages (e.g. gmail.com, boardgamearena.com/lobby) but doesn't seem to happen on static pages. Note that this doesn't depend on page elements moving around the visible window (e.g. panels opening and closing).

The manifesting problems:

• Screen pointer rapidly switching between standard arrow pointer, mouse with index finger (clickable link) and serifed-style insertion bar, even when positioned on a part of the page that is not a link or a text box. Video (MP4, <1MB) showing behaviour at https://imgur.com/a/absjTh4.
• Browser intermittently fails to respond to browser actions (mouse clicks, keyboard entry)
• Small increase in browser CPU usage

Problem is worse if general CPU usage (from other applications) is already high - low CPU usage reduces but doesn't eliminate the problem. (Established by changing my BOINC settings and/or snoozing BOINC and observing; I have a gadget that monitors CPU and other resource usage.)

The fact that I can see the problem occurring on Fx 141 but have Fx 140.0.4 working fine at the same time on the same page, suggests that this is a Fx 141 issue. Regular malware scanner and an alternate found no issues.

Happy to do more diagnostic testing if it's helpful.

As the question stated I have navigated to my mozilla profile folder, ( C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\pw1dnvcy.default-release ) but there is no file called persdict.dat. I have ensured all file name extensions are visible, & none are hidden in windows file explorer (Win 10). I am at al loss I cannot figure this out.

I had to re-installed from 0 my windows. I was sure my Firefox account had all my passwords and logins because I had problems in the past regarding this. Installed Firefox into my new fresh windows. Hit the Sync bottom. Lastly, remove the old Firefox account login from old windows (for safety).

Now I checked password, 0 passwords saved.....

I am trying to re-sync but nothing happens...

I cannot change the background image when my Firefox app opens on my MS Windows laptop. During set-up, the system had me select an image, but I want to change it as I find it distracting. Thanks!

Google suggestion in Firefox's address bar keep showing Japanese suggestions even though I chose English and Canada as language and location with my google account.

I use same google account with google chrome, but google chrome doesn't show Japanese suggestion.

As for setting on Firefox, I unticked other than "show search suggestions".

How do I resolve it?

Thank you.

I had FF set up with a full page of frequently used link icons. When I ran CCleaner, it caused all of them to disappear. I've tried following the links, but have had no success so far. Any help would be greatly appreciated.

I am sitting in hospital with a weird problem. The connection is open and thus not secure. I have successfully connected my 2 android devices, however my Windows Asus laptop is being barred by firefox. I only run firefox. It is a dead end because firefox refuses to allow me to access the net at all. So now I have to get my wife to go and download chrome and see whether that will work. Why can I not override as u understand the risks I also use Norton 360 with its VPN.

Hi, I am having a problem with the recently introduced Firefox profile system. In the Windows taskbar, different profiles stay grouped under the same icon. The only workaround I found is going into taskbar settings and setting it to 'Never combine,' but that causes every program to show text labels, which looks ugly. I also tried modifying taskbar.grouping.use_profile in about:config, but it didn't solve anything

since yesterday whenever I try to open Firefox, it just crashes immediately. I get the option to choose a profile but after I choose I see the window open very briefly and it closes immediately after and gives me the crash report thing. I don't want to reinstall as my data is on there and I'm not sure if it's linked to an account or no.

Sir, I am unable to add 'Grammarly' in my Firefox browser extension. Every time, the following message appears: "The connection has timed out". Please look into it. Regards

Hello, I'm having problems running the Synology C2 Password extension in Firefox and the Synology support engineer wants me to send them a "System Diagnostic Log". In detail, they asked me to do the following: 1. Launch Support Center on your device. 2. Go to Support Services. 3. Click Generate Logs. Is this something you do in Firefox, or is this generated by the computer operating system? I'm running a MacBook Pro with macOS Big Sur 11.5.2 and Firefox Version 136.0.4. Thank you very much to whoever answers my question. Cheers.

I'm not sure when it started (this week maybe?), but I've been noticing a small graphic appear to the right beside the Firefox icon when I hover over it. The same graphic also appears when hovering over Thunderbird's icon. Does not appear when hovering over any other icon on my task bar. It appears whether I am connected to the internet or not. I ran Malwarebytes latest build antivirus, which found nothing. Any ideas what this graphic is and/or what is it for?

I've made a screenshot, which I'll attach.

Running Firefox 133.0.3 64-bit, on Windows 11 Home (Build 22631.4602) , using DuckDuckGo as the search engine. The version of Thunderbird I'm running is: 128.5.2esr 12th Gen Intel(R) Core(TM) i9-12900K 3.20 GHz