Firefox Community Forum

I've loved Firefox for years but can no longer use it because I have been unable to resolve this issue. All was well, an update was done, and bingo, I got this message. I don't know how to fix it. I removed Firefox from my desktop and re-installed. Same problem.

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem."

Hi Yesterday I replaced my computer. I'm trying to sync my account data, but unfortunately, nothing is syncing. I have all the data selected for syncing (bookmarks, history, etc.), and the logs in about:sync-log are empty. It looks like the data from your server has been cleared. Firefox is freshly installed. Please help.

Every search I make to find out how to Move the Sidebar to the left or right talks about opening bookmarks in the sidebar and clicking the arrow next to bookmarks and choose Move the Sidebar to the left or right. Only after the latest update, there is no arrow anywhere! I've clicked every menu I can find and cannot find Move the Sidebar to the left or right anywhere. HELP!

Instead of syncing my current settings, sync just overwrote them with an old, outdated copy from another device, completely ruining my addons, bookmarks and various other settings. I managed to restore the bookmarks, but is there really no proper way to undo this or prevent such thing from happening in the first place? Is there no way to control if I want to sync my setting TO the server or FROM the server? How such a vital decision is even made then and why wouldn't there be a way for a user to control that? This is so disappointing :(

Hi there, I sound like a silly question but I'm really lost what is supported and not supported in regards to passkeys.

I have learned that Firefox supports logging in with passkey, but where are the passkeys stored? Does Firefox store them internally (like passwords) or do I still need a third party service?

I use Firefox on Android, Windows and Linux, so I would like to synchronize my passkeys between all devices, operating systems.

Thank you. Stefan

Hello,

I have an account at the EU webgate portal and when I try to open the login screen I get a blank screen, when I try to open it from Firefox on OpenIndiana. Of course, there is no problem when I try to open this page when using Firefox in Windows or Android. The interesting thing is that when I enter the following words to google search

EU webgate login

the first result is the following one

EU Login - server inaccessibility - European Commission

However, when I try the same thing suing Firefox in my smartphone the first result is

My account on EU Login

I really do not understand what is going on! Can you please help me solve this problem?

Regards,

Apostolos Syropoulos

I cannot display Amazon Deals properly that contain multiple he products. The home page and single products display normally. should be. A page with multiple products has large blank areas where the product should be. If I move the mouse over these spots, a soundless video will often display.

My clearing of the temporary cache files did not help. Stopping Ghostery doesn't help either. Other add-ons include Last Pass, Honey, Review Meta and Facebook Fences.

Help is appreciated.

hello

today i was trying to download the "beta 142 semantic test day" its over on Aug 1st. i get message: "the app you're trying to install isn't a microsoft-verified app?" Anyone else get this message? (it said installing from the micro-soft store protects?)

Thanks for reading.

Hi,

Firefox version: 139.0.4 (64-bit) OS: Windows 11

I have been having issues where Firefox tab will just crash out for no reason it appears and it happens at random times and once the tab start to crash, and I restore it, it will crash again and again. The only way tog et out of the loop is to restart Firefox.

I have tried: Refreshing/Reset, Clearing Cache and History removing all themes, disabling extensions, disabling my anti virus. Turning off hardware acceleration didn't make any different.

I currently have 2 extensions enabled: uBlock Origin 1.64.0 and Bitwarden Password Manager 2025.5.0

In the about:Crashes I have reported them all and they seem to have the same type of reasons in the Raw data/Minidump which are: EXCEPTION_ACCESS_VIOLATION_WRITE EXCEPTION_ACCESS_VIOLATION_READ

Any help as to what to try next?

Gaz

When using the new version of Firefox, I found that bookmarks only appeared in new tabs. Once I opened other web pages, there were no bookmarks above the screen, which made me feel inconvenient. Previously, the new tabs could also be customized, but now they can only be blank or the default pages of Firefox. So, can the new version of Firefox solve these problems? Or which of the older versions of Firefox can still meet my requirements?

Bonjour,

I forget my Mozilla account password. I follow the process ( forgot password selected) I receive an email from Mozilla on this mailbox: [email address] ; here the part with code If this was you, here is your confirmation code to proceed: 18884199 I don't receive a second mail or any information to proceed with this code. It don't work in the login password window.

Thank you for help!

Have an app with a web interface that I used for years, but not with several of the latest versions of FF. Chrome, Edge, and DuckDuckGo all show the page as expected and the page functions properly.

URL: http://127.0.0.1:8384/ Error looks like this:

Unable to connect

Firefox can’t establish a connection to the server at 127.0.0.1:[port number].

   The site could be temporarily unavailable or too busy. Try again in a few moments.
   If you are unable to load any pages, check your computer’s network connection.
   If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.

Have tried a large number of things including:

Ping works for ip and hostname, v4 and v6 Confirmed address is accessible through other browsers Disabled extensions Added exceptions in Settings for HTTPS-only mode Various settings in about:config, careful to return them to previous states when they didn't fix the problem Tried Safe Mode (aka Troubleshoot Mode) Refreshed Firefox (as prompted before uninstalling)

My last step is to reinstall, but thought I'd ask here first. Has anyone seen this before?

Hello,

I can't figure out how to add a custom search shortcut, is this no longer possible in Firefox (without installing addons/extensions)?

I recall 'custom search' being more or less ubiquitous, and feel like there was an "Add" button below the Search Shortcuts UI not that long ago.

Bookmarks with keywords would be a reasonable workaround if it weren't for having to prefix the keyword to the search terms.

Thank you, Kyle

Okay, i have been using librewolf for awhile now since i got my desktop fully built. today i went to go search something related to my phone and instead of using duckduckgo it automatically used Google. i do not want this and have no idea how to fix it