Diễn đàn hỗ trợ Firefox

I use an iMac (2019) and MacBook (2015) but my tabs aren't syncing between the two.

I've refreshed the syncing a few times but the MacBook is still showing two lots of tabs for the iMac, and both of them are showing pages that are no longer open.

I'd really like to be able to move between the two so if anyone has any suggestions on how to get FireFox to sync, I'd be really grateful. :-)

Instead of syncing my current settings, sync just overwrote them with an old, outdated copy from another device, completely ruining my addons, bookmarks and various other settings.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,

I use Firefox app in macos, android and ipados. The bookmarks across them are not synching automatically. I need to press sync manuelly to do. All apps are updated, all settings look fine. Please help me synch bookmarks across platforms. Thanks a lot.

Running Mint on a removable drive on Win 11 machine. Launched Firefox and wanted to sync across devices. Finally ended up here (see attached). There's no "synch & save data" and the other sync at top of settings doesn't follow that path. The image on the Mint desktop doesn't scan within Firefox and using a separate scanner app produces a "do this within FF" error. Confusing and no way to resolve. I tried an extension scanner no help. Attachment shows Sync Now only possible method not correct (what I describe above).2nd image is what I see on PC screen (via Mint).

Firefox crashes. Blue dots moving next to too tabs. Problem began this morning upon opening Firefox and dialogs box asked if wanted to sync bookmarks with another device with Firefox.

I reinstalled Windows. Installed The last version of Firefox and logged into my account. But there weren't any of my previous settings (extensions, bookmarks, history etc.). What happened with them?

I had a previous account with firefox on a different computer and attempted to login on a new one, but once i logged in none of my passwords or data transferred even though it was the same account, just curious if there’s any way i can get my info onto my new computer besides using a sync key or manually importing it

installed latest FIREFOX, but cannot recover previous passwords and bookmarks Used to use 'Sync' login and password and it would auto download to the clean Firsfoc install. Now it wont ans years of passwords have vanished and I am in trouble! Please advise

My syncing my desktop to my Android phone has stopped. When I try to sync, nothing happens. I'm trying to sign in and you system keeps on telling me to check my Microsoft Authenticator, but nothing happens there (on the phone) and I don't see authenticator on my desktop. I've recently changed some passwords (not Firefox) and need my phone Firefox updated. Please help.

The 2-year-old support page "View synced tabs from other devices" gives 2 methods for syncing all your tabs from one Windoze FF to another. Neither one does anything at all for me now. The "right-click on the device in the sidebar" sounded SO promising, but it does not cause anything at all to happen. And checking the "sync tabs" box does indeed make them all show up in the sidebar list, but does not open anything. So besides clicking on each of the hundreds of tabs listed, how can I do this, or is it just another FF functionality lost to time?

I wish to switch to a new primary laptop. I normally use multiple machines in the course of a day. I have probably hundreds of open tabs on my main computer and even though I checked "Open Tabs" for sync, they never show on my other devices.

Following previous help recommendations I searched for the json sessions file...it doesn't exist anywhere on my system. The only other "help" was to "tap" tabs in the lower right corner. There is nothing in the lower right corner unless, perhaps on a phone, which isn't the device in question.

Please help

15/12/2025 I need to sync my firefox data from my old windows 10 laptop to my new windows 11 laptop. Do I have to download the firefox app on to my new laptop before I can sync it, and will I need a new password if I have to download the app. Im using my old password on my old laptop to write this. On the new laptop, I tried to sign into firefox on the internet but, it said my password is wrong. I'm an oldie and have no idear what to do. Iwill be very grateful for any help. Many Thanks,

                                                                                           Janet.

Recently, Firefox has been slow and crashes regularly. I try to sync tabs but after it crashes and I reopen it goes back to a much older save and lose tabs I've recently opened or sometime after a crash and reopen it tries to open a window with no tabs and I lose all my tabs

I just bought a new PC, part by part, and used my storage devices from my old PC. I formatted the windows drive and am on a fresh installation of windows 11. I tried to log in to my mozilla account, but couldn't remember my password so I used the "Forgot password" function. When I logged in, no bookmarks or history was saved. Is it possible to restore my synced data?