Firefox Community Forum

Several weeks ago, I was attempting to upgrade from Windows 10 to Windows 11. In the process, I deleted Firefox (using Revo Uninstaller) and then reinstalled it, downloading it from the Mozilla website. Unfortunately, it didn’t run, giving me, at different attempts, different error messages. In the time since then, I have read many suggestions from many different websites and I have tried some of these suggestions, all with no success – until today. I have just completed the suggestions made on https://support.mozilla.org/en-US/questions/1327628 and Firefox is now back, working. I am happy and grateful, but not finished. None of my personal data came with the currently functioning version of Firefox. Since the re-emergence of Firefox, I have been reading several websites dealing with copy, backup and restore of my Firefox profile. Right now, the path C:\Users\rsuth\AppData\Roaming\Mozilla\Firefox\Profiles\ shows 5 folders: Two of the folders show 11/11/24 as the date modified (probably the date of the download from Mozilla). The folder 0dppjrfa.default contains one file, times.json, dated 8/11/2020. The other folder, ru82tlj5.default-release, has 97 items, most dated 11/11/2024. The remaining three folders are all dated 12/2/24 (today, as I write this). One folder’s name ends .default, the second name ends .default-release, and the third name ends .default-release-thirteen digits. The question that I am asking here is what do I do next to, hopefully, bring back the personal date I had with Firefox before my updating to Windows 11. Should I delete the folders dated 12/2/24? What, if anything, is the significance of the folder whose name ends in 13 digits? I’m hoping someone will be able to tell me how to fix these Firefox problems. And if I can, then I hope to be able to do something similar to help me bring back Thunderbird as well. Thunderbird became unfunctioning at the same time as Firefox. Thank you.

I have lost all of my bookmarks, bookmark tool bar after Firefox's last update. I have spent the last day trying to recover what has been lost but I am having no luck in getting everything back in place. I have tirelessly gone over all your possible remedies and get no results. I can't even send a message to Mozilla through their help messaging system. My only recourse appears to start using another web browser. If I can't talk to someone who can help guide me through a mess I did not cause, then I am forced to find another company that is responsive to my problems. Call me at [edited] or write me at [edited] if you want to keep me as a user of your service. Regards Mark Hannah

[edited email and phone# from community support forum]

Hello, I've got a bit of an issue with Sync. So, my current sync profile is outdated by ages, and I'd like to delete it completely and update it with all of the information on my desktop browser. But, when I try to enable sync on my desktop it overwrites my desktop profile with all of the outdated information saved on Sync. I can't seem to find anywhere to delete the saved Sync data so that I can upload a new copy.

I hope someone can help, thank you!

with the new function of Tab Groups i was wondering if it is possible, or can be added in the future, to sync existing Tab Groups to all or specific devices in order to access created groups on my private Macbook to my work Windows Firefox.

thanx for any reply

I would like to be able to download YouTube videos.

Is there a Firefox add-on that will allow me to download YouTube videos onto my MacMini?

I tried Video DownloadHelper and YouTube Video Downloader and didn't see any action.

Do I need to setup settings a certain way to make it work?

What are the steps to make it work?

Thank you for your assistance.

I recently switched from Linux to Windows and installed Firefox on my new system. I signed in with the same Firefox Account that I had used on Linux, but none of my bookmarks, shortcuts, or other data have synced. It feels like a fresh Firefox setup. Here’s what I’ve tried so far: 1. Confirmed that I signed in with the same Firefox Account. 2. Verified that Sync is enabled for bookmarks, history, and other items on Windows. 3. Triggered manual sync multiple times, but nothing has appeared. Is there any way to check if my bookmarks were stored on the Firefox servers, and if so, how can I retrieve them?

I'm not sure what type of issue this is, so hopefully I’ve posted it in the right place!

Devices:

• Firefox version 133.0 on 2022 M2 MacBook Pro OS Sequoia 15.1.1
• Firefox version 133.0 on iPhone 16 Pro Max iOS 18.1.1 (*for reference, of checking issue, not where issue is occurring)

Issue Breakdown: While updating my bookmark's tags in Bookmark Manager, my tags all but disappeared and other strange things started happening.

• My tags aren't in the sidebar menu of the Bookmark Manager at all. See Screenshot 1.
• Already tagged bookmarks retained the tags, but I’m unable to edit, add, or remove bookmark tags at all. When the bookmark is selected, the bookmark’s tags, nor any other tags, appear in a list under the bookmarks tags. See Screenshot 2.
• I can locate all bookmarks with the same tag by searching bookmarks in the Bookmark Manager.
• I can move and rename pre-existing bookmarks.
• I can add new bookmarks (confirmed by the blue star beside the address bar on the main browser after exiting and re-entering), but I cannot find those bookmarks anywhere in Bookmark Manager.
• My mobile bookmarks folder isn’t shown in Bookmarks Manager, but I can view 11 bookmarks in my Mobile Bookmarks folder on my phone’s Firefox application.

I’ve tried the following:

• restarting Firefox by quitting the application
• refreshing Firefox through the browser [https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-se...]
• restarting my computer
• clearing the startup cache
• clearing the cache [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache|link]
• restarted in Troubleshoot Mode [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubl...]
• uninstalling then reinstalling Firefox software

I have no idea what is wrong with it or what is going on. What else can I do?

I'm 84 and know little about computers - when I try to get into e-mail it says "program running but not responding" How do I correct this? Please help. Since I can't open my e-mails you can't reach me. Phone: [edited phone# from public community support forum]

I found a folder on my desktop entitled Old Firefox data. It contains a folder entitled 3h0lsis5.default-release. It's almost 900 MB. Do I need this folder? Or can I delete it? Thanks in advance.

The font size in "Manage Bookmarks" is way too large, both in the sections list menu on the left and the list of bookmarks. I checked my userChrome.css file as well as the layout.css.devPixelsPerPx entry in about:config and there's nothing there to explain why only the "Manage Bookmarks" text is so large.

It's possible I changed a setting somewhere that's causing this. But I'm stumped re: what setting might be controlling the font size in only that UI. All other Firefox text sizes are good.

Thanks to anyone who knows where I should be looking

Firefox 134.0.1 (64-bit) Windows 10

Hi I have lost all my browsing history and nothing I browse is saved. Also all my bookmarks have disappeared and I can't save anything even clicking on the star doesn't do anything I have quite a bit of stuff bookmarked, can you help? The browsing history and my bookmarks seemed to disappear at the same time.

i had setup a new windows and when i tried to sync my Firefox data i found nothing and all my bookmarks and passwords was lost.

i need you support to recover my data.

Hi,

I have logged in in a new device with my firefox account and I can´t see anything of my backed up data.

Passwords, bookmarks, pluggins are gone... And I checked before that I had my sync on and everything was synced.

Before that, I added a secondary email and then put it as primary. Could you please check?

I recently updated Firefox on my computer. After that, I can't find my old Bookmarks.

Also I find that I am UNABLE to add any new Bookmark. When I click on the 'Star' in the browser toolbar, there is nothing. Before I used to Get the Add Bookmark tab and a place to SAVE, now there is nothing.

Even after I type in the URL in the address bar, and open up the required page, I am unable to Add it to my Bookmarks.

Please Help!

Gopi Menon [edited email from community support forum]

Hi- I'm trying to setup two step in Microsoft Authenticator. I scan in the QR code from the Mozilla settings and that appears to work. However when I copy the generated code from the app and try to enter it back into the settings in my browser it tells me the code is wrong and thus I can't setup two step. I've tried loads of different authenticator apps and none seem to work. Can you help please? Thanks- Adrian.

I had to reset my firefox password. When signing in, the account is not synced (no extensions, history, bookmarks etc) and acts like it is the fresh instance. When manually syncing, it spins for a second then stops. Says it last synced 1 second ago. I see no data otherwise. Does resetting password seriously remove all data? What is the point of recovering the account if it gives you a fresh account anyway? There was a disclosure that mentioned some data, but not even including bookmarks or extensions is a little upsetting for me. Disrupted my work day quite a lot.

Hello today i went to a it specialist, he reinstalled my windows and i lost all my backups i had been using firefox for a few days and saved a lot of stuff in bookmarks but now they dont sync i can only sync my old bookmarks from edge.Is there a way to check if my bookmarks were saved on a server?

Long time user of sync and now totally pissed because I have to discontinue it because I can no longer trust it. It was so useful.

Syncing between mac and windows desktops. On mac suddenly have duplicate folders appear on the bookmark toolbar. Delete the duplicate entries. Later discover that duplicates and original folders have been deleted. Problem compounds when switching to windows to find sync has very helpfully has deleted these folders there too. There was no way to disable syncing to prevent this. So that means when you do something stupid on one instance, you have no way to prevent that mistake from spreading to other computers. Nice one.

No sync-log found on mac to investigate why the folders where duplicated. so no way to file a bug.

All I can do now is disable sync on all computers. Be nice if there was some kind of roll back.