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Bookmarks and their functionality wiped out by CCleaner

CCleaner wiped out my bookmarks and their functionality. I have repaired, then uninstalled CCleaner. I have refreshed, uninstalled then reinstalled Firefox. I have log… (read more)

CCleaner wiped out my bookmarks and their functionality. I have repaired, then uninstalled CCleaner. I have refreshed, uninstalled then reinstalled Firefox. I have logged in and out of Firefox. I have made an HTML file of bookmarks from another device in order to try to import them. Firefox bookmarks will not proceed to an upload stage. I went into setting to add the HTML of bookmarks and it said "this is not a bookmarks file." Well, Firefox made that HTML bookmarks file so I have no idea how that could be. Nothing I have tried has worked.

Asked by Znon 3 weeks ago

Answered by Znon 2 weeks ago

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Bookmarks and History not functioning.

This is the message I get when I try to access my Bookmarks: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another … (read more)

This is the message I get when I try to access my Bookmarks: "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." I have already tried to find out from Microsoft if their latest reinstallation of Office Professional could have caused the problem. They say they have nothing to do with Firefox. How can I get my Bookmarks and History back?

Asked by nmbourne 1 month ago

Answered by nmbourne 1 month ago

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Bookmarks and History not working

Since Firefox automatically updated (14.0.1) on my MacBook Air (2025 model) several weeks ago, the Bookmarks and History functions haven't worked. Can anyone suggest how … (read more)

Since Firefox automatically updated (14.0.1) on my MacBook Air (2025 model) several weeks ago, the Bookmarks and History functions haven't worked. Can anyone suggest how I can fix this?

Asked by rob.maclachlan 2 weeks ago

Answered by rob.maclachlan 1 week ago

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Restoring tabs lost from closing firefox closed all tabs even though 'open previous windows and tabs on startup' is on

Several times now I've closed firefox while having the open previous windows and tabs on startup on only for all my tabs to have been closed (with this time in particular… (read more)

Several times now I've closed firefox while having the open previous windows and tabs on startup on only for all my tabs to have been closed (with this time in particular being annoying due to losing tabs that I needed to have the specific link for). Is there any way to restore tabs lost in this way?

Asked by Skylark 1 month ago

Answered by jonzn4SUSE 1 month ago

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Restoring Firefox bookmarks

Mozillers, I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stop… (read more)

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

Asked by AntonioLambe 2 weeks ago

Answered by AntonioLambe 2 weeks ago

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BOOKMARKS AND FAVOURITES

There was a issue with my computer due to which I had to reset the unit and once the reset was completed I'm unable to recover my data as its asking for 32 account recove… (read more)

There was a issue with my computer due to which I had to reset the unit and once the reset was completed I'm unable to recover my data as its asking for 32 account recovery key, I'm unable to find that key anywhere and need help where can i find the key as there are important bookmarks which I need back.

Asked by SuMo Bot 1 week ago

Last reply by Paul 1 week ago

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Recovering Disappeared Firefox Bookmarks

I still have not made any progress recovering my lost Firefox bookmarks. I have tried several methods with no success. The bookmark toolbar doesn't work, so I can't bookm… (read more)

I still have not made any progress recovering my lost Firefox bookmarks. I have tried several methods with no success. The bookmark toolbar doesn't work, so I can't bookmark any more pages. I tried restarting the computer and Firefox to no avail. I am considering switching to another browser. I am using Duck Duck Go which is not as good as Firefox that I have been using for about the last 10 years. I might try Microsoft Edge or Bing or some other browser.

Sincerely

Jeff [email address]

Asked by jspike67 2 weeks ago

Last reply by Paul 2 weeks ago

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Lost Contacts

My previous post seems to have disappeared, so will try again. I am 85 years old and have been using Thunderbird fo over 15 years with out any problems. Afew days ago I … (read more)

My previous post seems to have disappeared, so will try again. I am 85 years old and have been using Thunderbird fo over 15 years with out any problems. Afew days ago I tried to send an e-mail and didn't have any "Send" button. In trying fix, I some how deleted my contacts sidebar. I sill have my addresses book. I have tried everything to retrieve them but no luck. I tried removing Thunderbird and reinstall, but it comes back the same. I would appreciate an guidance in trying to resolve my problem. Thank You

Asked by Gerald Woldt 1 year ago

Last reply by James 1 year ago

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I accidentally deleted the "Today" subfolder that exists under the "History" section in Mozilla. How can I get it back?

Hi. I accidentally deleted the "Today" subfolder that exists under the "History" section in Mozilla. How can I get it back? I'm not interested in getting the internet … (read more)

Hi. I accidentally deleted the "Today" subfolder that exists under the "History" section in Mozilla. How can I get it back? I'm not interested in getting the internet history from today back, just the folder. Thank you for your help.

Asked by zombiemom123 1 year ago

Answered by zombiemom123 1 year ago

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Perdida de marcadores

Siguiendo sus instrucciones facilitadas, he conseguido recuperar la carpeta de mi perfil anterior pero no se qué hacer con ella para que aparezcan los marcadores de siemp… (read more)

Siguiendo sus instrucciones facilitadas, he conseguido recuperar la carpeta de mi perfil anterior pero no se qué hacer con ella para que aparezcan los marcadores de siempre en la aplicación, cómo lograrlo Gracias

Asked by Juan Luis 1 year ago

Answered by cor-el 1 year ago

  • Solved

Bookmarks disappeared and cannot import my Bookmarks backup

Bookmarks in Firefox disappeared and cannot import my Bookmarks backup. I have tried to restore an older Bookmark file through /manage bookmarks/ import and backup/restor… (read more)

Bookmarks in Firefox disappeared and cannot import my Bookmarks backup. I have tried to restore an older Bookmark file through /manage bookmarks/ import and backup/restore to no avail. thank you

Asked by Graham Jones 3 weeks ago

Answered by jonzn4SUSE 3 weeks ago

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Updated Firefox and lost Bookmarks

More of a comment. Firefox is the only browser I have used. Love it! Many important bookmarks to easily navigate. Broser update messed up bookmarks and took me hours to g… (read more)

More of a comment. Firefox is the only browser I have used. Love it! Many important bookmarks to easily navigate. Broser update messed up bookmarks and took me hours to get back! Found. Save key and/or password! Learned a lot about profiles and Firefox along the way. Ugh!

Asked by Larry Shell 2 days ago

  • Solved

Bookmarks gone AGAIN!

I am incredibly frustrated by the continuing problem of all my Bookmarks disappearing with the usual "The bookmarks and history system will not be functional because one … (read more)

I am incredibly frustrated by the continuing problem of all my Bookmarks disappearing with the usual "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." This issue has been going on since NOVEMBER!!! I usually manage to get my Bookmarks back by closing all txt files that I need to keep open, store them in a new folder on my laptop, and then restart my laptop. This time, it didn't work.

Can anyone steer me to a permanent solution to this problem?

Thanks, in advance, for any help offered.

Asked by nmbourne 2 weeks ago

Answered by S 2 weeks ago

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Recovering old data

My laptop crashed and I had to format my hard and install new windows. I have kept my passwords database files, which uses to be key3.db and key4.db along with logins.j… (read more)

My laptop crashed and I had to format my hard and install new windows.

I have kept my passwords database files, which uses to be key3.db and key4.db along with logins.json and logins-backup.json files from my old use with me separately...

But the new Firefox folder didn't create these files anywhere where I could replace them with my files to get my stored passwords back.

Please help me restore my data from these files onto my new Firefox so I can get my stored passwords back.

Asked by doctoranaskhalil 10 months ago

Answered by doctoranaskhalil 10 months ago

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  • Archived

Firefox Developer Edition 137.0b5 lost bookmark folders

Dear Mozilla Geeks— As practically every other Firefox user, my bookmarks evolved into a lengthy file system that uses folders to segregate categories of bookmarks. Tha… (read more)

Dear Mozilla Geeks—

As practically every other Firefox user, my bookmarks evolved into a lengthy file system that uses folders to segregate categories of bookmarks.

That is, it used to have this feature.

After the last update all or most of the bookmarks (I can't tell by scrolling down the long list) are devoid of their organizing folders. This puts a great deal of information beyond easy reach. In Mozilla Help topics one is advised to click on the library icon in the toolbar ... only there is no such icon on my copy of Developer's Edition.

Can someone suggest a method or methods to recover the folders?

Some passwords have been lost as well.

Yours Sincerely,

Glen

Asked by Glen Kohler 10 months ago

Answered by jscher2000 - Support Volunteer 10 months ago