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Firefox sync destroyed everything, how to restore ?

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Hi, I'm at work and wanted to access a single bookmark folder from my home computer. I tried to login to my firefox account through a WEB PAGE - hoping I could access a list of bookmark like I used to do back when XMarks was a thing, I did NOT click on firefox synch ! However, firefox somehow decided that it meant I wanted to synch and started messing everything up. It added all my home bookmarks to my workplace computer, ruined the history (merge), extensions and so on. So I told it to disconnect sync and remove the sync data. Guess what ? It didn't just remove the data it just got from sync. It totally destroyed everything. Work bookmarks, gone. History, gone. Addons, all gone. It's nearly as if FF was a brand new installation. I'm panicking right now. Is there any way to go back ?

Hi, I'm at work and wanted to access a single bookmark folder from my home computer. I tried to login to my firefox account through a WEB PAGE - hoping I could access a list of bookmark like I used to do back when XMarks was a thing, I did NOT click on firefox synch ! However, firefox somehow decided that it meant I wanted to synch and started messing everything up. It added all my home bookmarks to my workplace computer, ruined the history (merge), extensions and so on. So I told it to disconnect sync and remove the sync data. Guess what ? It didn't just remove the data it just got from sync. It totally destroyed everything. Work bookmarks, gone. History, gone. Addons, all gone. It's nearly as if FF was a brand new installation. I'm panicking right now. Is there any way to go back ?
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  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0

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My_Cheese_Is_Slippin'
  • Top 10 Contributor
39 個解決方法 445 個答案

Hi Keorl, You can easily restore your bookmarks on your work computer. Firefox does a back-up of your bookmarks every day - automatically. See this article for the How To: Restore bookmarks from backup

Hi Keorl, You can easily restore your bookmarks on your work computer. Firefox does a back-up of your bookmarks every day - automatically. See this article for the How To: [https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them Restore bookmarks from backup]
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My_Cheese_Is_Slippin'
  • Top 10 Contributor
39 個解決方法 445 個答案

Keorl, As far as I know, History, Extensions, etc. can be recovered from an "old" profile: Recovering important data from an old profile if one is available.

Keorl, As far as I know, History, Extensions, etc. can be recovered from an "old" profile: [https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile Recovering important data from an old profile] if one is available.
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jscher2000
  • Top 10 Contributor
8573 個解決方法 70108 個答案

Hi Keorl, for everything else other than bookmarks, I realize that is a disaster. As far as I can tell, that "remove data" feature was intended for when you accidentally used Sync on a public PC (like at your local library) and not a PC you use regularly. More warnings may be needed.

Meanwhile, I suspect everything is going to transfer to your home computer, so while I do suggest making a quick backup of the home computer before letting Firefox reconnect -- see: Back up and restore information in Firefox profiles -- you may end up with your missing work history, etc., at home and then there might be some options for transferring it back, although now that it's mixed up, not very easily.

Does your office make local backups of your computers? The critical folder is your profile folder: Profiles - Where Firefox stores your bookmarks, passwords and other user data.

Windows 10 may have created a shadow copy of your profile folder at the last system update. Please do not use System Restore -- that usually makes things worse -- but what you would do is scour the latest restore point for files to use for recovery. Your IT policies might restrict installing these programs, but here are the details:

Finding/Using Shadow Copies

You can use a utility program to search inside restore points to try to locate a recent file that's usable. (Please do NOT try to use the built-in Windows System Restore for this because you would lose too much data.) Here are the steps:

(1) Set Windows to show hidden files and folders:

https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files

(2) Download and run one of these two programs:

Within the most recent restore point shown in the program, you can explore along this path to see whether you can find a shadow copy of your profile:

\Users\your-user-name\AppData\Roaming\Mozilla\Firefox\Profiles\

(3) Two things to check:

You can export the entire profile folder (names are somewhat like ab12cd34.default) to your currently live desktop or documents folder.

Anything useful?

Next step would be: Recovering important data from an old profile

Hi Keorl, for everything else other than bookmarks, I realize that is a disaster. As far as I can tell, that "remove data" feature was intended for when you accidentally used Sync on a public PC (like at your local library) and not a PC you use regularly. More warnings may be needed. Meanwhile, I suspect everything is going to transfer to your home computer, so while I do suggest making a quick backup of the home computer before letting Firefox reconnect -- see: [[Back up and restore information in Firefox profiles]] -- you may end up with your missing work history, etc., at home and then there might be some options for transferring it back, although now that it's mixed up, not very easily. Does your office make local backups of your computers? The critical folder is your profile folder: [[Profiles - Where Firefox stores your bookmarks, passwords and other user data]]. Windows 10 may have created a shadow copy of your profile folder at the last system update. Please do not use System Restore -- that usually makes things worse -- but what you would do is scour the latest restore point for files to use for recovery. Your IT policies might restrict installing these programs, but here are the details: '''''Finding/Using Shadow Copies''''' You can use a utility program to search inside restore points to try to locate a recent file that's usable. (Please do NOT try to use the built-in Windows System Restore for this because you would lose too much data.) Here are the steps: (1) Set Windows to show hidden files and folders: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files (2) Download and run one of these two programs: * System Restore Explorer: http://nicbedford.co.uk/software/systemrestoreexplorer/ * ShadowExplorer: http://www.shadowexplorer.com/ Within the most recent restore point shown in the program, you can explore along this path to see whether you can find a shadow copy of your profile: \Users\''your-user-name''\AppData\'''Roaming'''\Mozilla\Firefox\Profiles\ (3) Two things to check: You can export the entire profile folder (names are somewhat like ab12cd34.default) to your currently live desktop or documents folder. Anything useful? Next step would be: [[Recovering important data from an old profile]]
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提出問題者

Thank you for your answers :)

What I did is reconnect to sync and remove all home bookmarks as well as some history. Now I'm still out of quite a few things like tampermonkey scripts, ff theme ... .. I don't have an old profile unfortunately : I looked everywhere for the one I saved from my old work computer (which was changed a few months ago) but apparently I deleted that zip after using it to set up this computer, and the usb stick was encrypted/rewritten in the meantime so Recuva doesn't help.

I'll try to find shadow copy of ff profile later today, it sounds promissing. If I can find one I'll just save the current not-ideal one and replace it with the old version.

Thank you for your answers :) What I did is reconnect to sync and remove all home bookmarks as well as some history. Now I'm still out of quite a few things like tampermonkey scripts, ff theme ... .. I don't have an old profile unfortunately : I looked everywhere for the one I saved from my old work computer (which was changed a few months ago) but apparently I deleted that zip after using it to set up this computer, and the usb stick was encrypted/rewritten in the meantime so Recuva doesn't help. I'll try to find shadow copy of ff profile later today, it sounds promissing. If I can find one I'll just save the current not-ideal one and replace it with the old version.
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