Diễn đàn hỗ trợ Firefox

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 But, when I try to enable sync on my desktop it overwrites my desktop profile with all of the outdated information saved on Sync.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!

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.

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.

The Firefox Sync system is really neat for keeping our booksmarks synced across devices, but what I would also love to see is the option to sync all settings as well, including the changes made in the "about:config" settings.

Across my years of browsing I changed quite a lot of small little things and having to track all of those down every time I set up a new device or reinstall windows can get a bit tedious, so I was wondering if those settings can also be included in the Sync settings somehow - or if such a feature might be planned for the future?

For example, say, you have 3 opened tabs in a Firefox (FF) windows. Normally, when you close FF and then re-open FF, it restores 3 previous opened tabs.

But, if you have another FF windows opened at the same time, when you close the FF windows with the 3 opened tabs and re-open back a new FF windows, FF won't restore the 3 opened tabs.

Same thing happens when you have another Private FF windows at the same time, when you close the non-Private FF with the 3 opened tabs, and then you re-open FF, it loses the 3 opened tabs.

That's why you can see 'countless' question about lost opened session, because of the issue above along with crash etc.

Is this a bug or a known feature?

Hello, After the last MacBook Pro M4 update my tabs keep disappearing. This is quite ANNOYING as I use ALL my tabs. Plus when I go to HISTORY there is NO Restore Previous session...so I am losing EVERYTHING. Do I just need to go out to another browser and make them my default? I can find NO help when I go out to your support for my problem. Thank you, Patty

/edit: moved thread from Firefox for iOS (for iPhone/iPad) to Firefox section as you have macOS.

Note: I always export all bookmarks to backup file and copy that to several safe locations for needed synchronization across different browsers and also restoring them if needed. Problem: I have repeatedly selected all items in Firefox bookmarks sub-folders and then followed by importing html bookmarks thinking that I was updating my bookmarks, so all my browsers had same. Instead, what I find is duplicated sets of bookmarks building up about 10-fold so that now any search for a site yields far too many duplicate listings and it is a mess. How do I prevent this from happening and how do I actually and truly delete all boomkarks in Firefox?

Aside topic: For all the folks who have accidentally lost bookmarks, my experience with losses has lead to always having backup files of bookmarks and backup listings in word or Excel of all my settings and extensions, etc. Automation has advantages, but it introduces new headaches. I can never allow myself to believe that everything will one day be just rosy. Also, multiple different browsers can be very helpful.

This is my original post. No response at all. Disappointing.

Non functioning Export/Import, upload images

At this point, if I could just get an opinion, a direction you might follow, if this was happening to you

It keeps recurring. This time it took 3 weeks from the time that last post. As I said in the past post, the problem is a corrupted 'sessionstore.jsonlz4 file.

My evidence is that when i ran about:support - Troubleshooting, the problem was still happening.

I just mounted a backup profile, created during the last incident. Works fine. I took the sessionstore.jsonlz4 from that backup and replaced the one in the problem profile.

After doing the replacement, the problematic profile symptoms have disappeared. At least for now, that is.

But now, I have to restore the missing portion of the session (tabs/history) created between the last occurrence and now, because of the replacement of the corrupted sessionstore.jsonlz4 with the backup.

Nobody has offered a way to do this that is not a time consuming ordeal.

What would you do?

Dear sir

I very much respect you and your app If you have banded my account or my comment due to some mistake of mine. So I apologize to you for that mistake. Now you can Unban my Account Or you can also send me a reply I will be forever grateful to you

Watsapp number [edited] Instagram ID [edited] Facebook ID [edited] Thank you for accepting my message or Feedback

After a routine system restart due to display driver crash my Mozilla Firefox ceased to work, displaying a broken link. After some messing around I decided to reinstall the application, but when I did it was an entirely new instance with none of my local saved data (bookmarks, passwords, history etc). I've been able to restore my bookmarks, but not my passwords. I've found the relevant key4.db and logins.json files pertaining to the older intall, but I have no idea how (if possible) to install them, and I assume there would only be a compiled csv if I created it.

Help!

Hi!

After computer reset I can't open my Firefox, it keeps showing that it's crashing. I have a few really important tabs there and would like to know if it's possible to reinstall it and still keep my tabs from previous session?

Thank you, Tijana

When I sync my Firefox account, my old data, themes, and add-ons come back. There are add-ons, themes, passwords, and usernames from 3-4 years ago that I no longer use. How can I reset my sync data and sync again? In short, there is an 'overwrite' situation; the old data remains while the new data is synced over it.

I am signing into my Mozilla account on a new computer with a clean Firefox install. I'm able to get into my account using an authorization code to my email, but Firefox Sync isn't working so no bookmarks/passwords/history/etc. I have a persistent "account disconnected" with a yellow triangle icon. Upon clicking through, I see "Please sign in to reconnect [my email address]" with a sign in button. Signing in does nothing. What's really strange is that my other Mozilla account works fine, which leads me to believe this is an account issue—except that I've synced this account across several devices already.

What do?

Dear Firefox,

I have just reinstalled my operating system after some issues. After reinstalling my browser, I logged into my browser after changing the password, but now no data is being synced. The open tabs, bookmarks and saved passwords were the most important, but none of that has synced back. After waiting for a little bit I decided to press the synchronize now button, but that also didn't do anything. Is there perhaps something wrong with the syncing right now? Or is there another way to get that data back? I didn't save it as I normally don't have to.

Thank you for your reply!

Kind regards, Lili

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

Thanks to a Microsoft update my PC had to have Windows reinstalled causing me to lose all my apps. I have reinstalled Firefox on the PC but of course, all my bookmarks and passwords are missing. I had set up syncing between my PC and my Android mobile devices (phone and tablet). Can I restore or sync from the mobile device back to the PC? I have searched and found nothing. Even when signed into Firefox on the phone, it does not bring up "Sync" when I go to settings. I truly appreciate your help.