Firefox Community Forum

Running MacOS 15.5. Former Firefox user, have not used Firefox for many months. Recently (last few months) when trying to startup Firefox it has not run successfully; always fails with an error message something like “Unable to load user profile …” and then Firefox immediately exits. Today downloaded newest Firefox v139.0. Now the same thing happens; but the failure message comes in Icelandic and Firefox exits immediately. How can I get past this ?

I have exported my theme made in Firefox Color (love it) - both xpi and zip. The theme has been working for 2 weeks. I just want to reinstall it to check, and eliminate Firefox starting with "default" and then loading my theme. I also have no backup if I had a computer malfunction.

I'm not sure how it can be "corrupt" since I'm looking at it working right now. I exported using your site and your buttons - but when I try to install it says "unable to install because it's corrupt."

When I updated my Firefox app, I was asked for an email address, which I supplied. This address was rejected. I used another email address, but one which I seldom used in firefox, and it was accepted. Now I see that I have two accounts, one under each address, and all my bookmarks and passwords seem to be associated with the rejected email address. There seems to be no clear way to move access them in the new installation,

Dear Mozilla,

you should be clearer in new Firefox versions about which changes need to be manually enabled or are being rolled out in stages. It’s really frustrating to keep reading about new features and being asked (I have the new version X - according to the news, Y should work...) only to find out that these features either arrive delayed to the end users or need to be activated manually.

And please give the user more choice about whether they want to use new features (for example the "https://" trimming, volume icon in tabs...) and provide an easier option than tinkering with the "userChrome.css".

Thanks and best regards, Martin

Every now and then, Firefox downgrades itself to version 121. In order to change it back, i have to update it to 127.0, and then to 137.0.1. After doing so, a couple hours will pass before tabs stop loading, and i have to close Firefox and open it again, for another error to show saying i was using an older version, and i need to update. this sends it back to version 121. The errors i get, I've attached !! There's also a troubleshoot data thing, not sure how that works though.

I've been using Firefox from its beginning and reply on some of its unique features for my work. Since the 138 update I've been struggling to manage with things that have always worked before not working any more. I just updated to 139, and they are still not working.

In Gmail, the delete and mark as unread buttons don't work - I click on them and nothing happens.

In YouTube, from the home page I can't open any video - when I click on the image or the title nothing happens. I have to use another browser for this most basic functionality.

I am using Windows 10 Pro with latest updates on a desktop computer with 16 GB RAM.

I cannot get the OpenH264 plugin to install on firefox, it is permanently stuck on "will be installed shortly". This seems to be the reason I cannot get my ring cameras to work on my desktop. I'm bad at computer stuff so my apologies and thanks in advance.

After Firefox is automatically updated, it installs two instances of the browser repeatedly, both in the same folder, making it impossible to uninstall one of them separately.

The latest update to 140.0b2 of the Devloper Edition turned the leters of the side panel to black... On a dark background. Some themes will make the background white and it makes it readable, but a whole bunch off themes (including my prefered ones) have become useless since the last update becaus eof this bug: the letters of the bookmarks in the side-panel are fixed to black. How can this be resolved?

I had installed an extension that allowed me to transliterate Cyrillic text. I think it was called Transliterator.

Today I noticed it went completely missing - it's not even listed at the bottom of about:addons as disabled.

What happened to it?

TIA

Hello,

I have download and installed the latest version of Firefox, have the following issue click on help on the menu but the following message appears on the screen unable to check for updates, have remove Firefox and install it again but no good.

Any help would be appreciated

Thanks Matthew

I can find the sites I use, this isn't the issue. I want to check I haven't been hacked in some way, which is more of a concern particularly over online banking and internet financial transactions. Thank you for your attention. Stephen

An automatic Firefox update has deleted firefox.exe from my Programs(x86) folder so the shortcut no longer works. I also think that my TALKTALK Internet WIfi also has deleted my own Favourites program that I use to get to various online applications. I have tried a new download for Firefox but still do not get a new working Shortcut.

Signature <unknown in nvwgf2umx.dll> | NDXGI::CDevice::FlushAndEnqueueSetEvent More Reports Search UUID d9593aae-27fc-42b4-ac33-c4df80250512 Date Processed 2025-05-12 00:33:56 UTC Uptime 603 seconds (10 minutes and 3 seconds) Install Age 169,246 seconds since version was first installed (1 day, 23 hours and 46 seconds) Install Time 2025-05-09 13:27:28 Product Firefox Release Channel release Version 138.0.1 Build ID 20250430203103 (2025-04-30) Buildhub data OS Windows 10 OS Version 10.0.19045 Windows Error Reporting

True

Build Architecture amd64 CPU Info family 6 model 23 stepping 6 CPU Count 2 Adapter Vendor ID

NVIDIA Corporation (0x10de)

Adapter Device ID

GT218 [GeForce 210] (0x0a65)

Startup Crash

False

Process Type gpu Crash Reason EXCEPTION_STACK_BUFFER_OVERRUN / FAST_FAIL_STACK_COOKIE_CHECK_FAILURE Crash Address 0x00007ffe333bfbf0 Total Virtual Memory 140,737,488,224,256 bytes (140.74 TB) Available Virtual Memory 138,531,054,325,760 bytes (138.53 TB) Available Page File 1,231,540,224 bytes (1.23 GB) Available Physical Memory 747,290,624 bytes (747.29 MB) System Memory Use Percentage 76 EMCheckCompatibility

True

App Notes

FP(D10-L1000-W0000100-T01) DWrite? DWrite+ WR? WR+The Crash report shows thus and my pc lost power suddenly and could not continue browsing .

Ich erhalte bei der Versions-Kontrolle die Meldung: Ihre Organisation hat updates deaktiviert. Wer ist die Organisation? Wie bekomme ich wieder autmatische Updates?