There are add-ons that can help you with that. Go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here) and search for cookies.

Can you be a little more specific and provide any add-on link that can do the job?

That is outside my experience. I've called the big guys to help you. Good luck.

OK but no moderators are replying. I need help

Please wait for them.

I don't think that cookies could be a cause for Firefox being slow unless you have extensions that deal with cookies. A large history is a much more likely cause for Firefox being slow.

The only way to keep specific cookies is to let cookies expire when you close Firefox and create an allow exception for cookies that you want to keep.

• clearing cookies will remove all selected cookies including cookies with an Allow exception you may want to keep
• clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exception for password and other website specific data

You can set network.cookie.thirdparty.sessionOnly to true on the about:config page to make third-party cookies behave as session cookies that expire when Firefox is closed.

You can backup the cookies.sqlite file if you want to have a backup of the cookies.

The cookie export extensions on the add-ons website are quite old and may not be working in current Firefox releases.

Someone once mentioned an add-on that saved important cookies and added them back at startup if they were cleared. However, after a few minutes of searching, I didn't see anything like that. You'll probably need to invest more time.

cor-el said

I don't think that cookies could be a cause for Firefox being slow unless you have extensions that deal with cookies. A large history is a much more likely cause for Firefox being slow. The only way to keep specific cookies is to let cookies expire when you close Firefox and create an allow exception for cookies that you want to keep.

• clearing cookies will remove all selected cookies including cookies with an Allow exception you may want to keep
• clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exception for password and other website specific data

You can set network.cookie.thirdparty.sessionOnly to true on the about:config page to make third-party cookies behave as session cookies that expire when Firefox is closed.

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You can backup the cookies.sqlite file if you want to have a backup of the cookies.

The cookie export extensions on the add-ons website are quite old and may not be working in current Firefox releases.

Where can I find cookies.sqlite file? How can I backup those files?

The cookies.sqlite file is in your currently active profile folder. See: Profiles - Where Firefox stores your bookmarks, passwords and other user data.

Its internal format is a SQLite database, so don't expect to be able to edit or copy from this file without special tools.

There are many files and folders in the profile folder stored in my PC. But which one should I save to backup my cookies?

You can use this button to go to the current Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

You may have to backup the permissions.sqlite file as well to keep the cookie exceptions.

See also:

• https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

If I backup the permissions.sqlite file then all my cookies are backed up too?

You need to backup both files, cookies.sqlite and permissions.sqlite,

• cookies.sqlite stores the cookies
• permissions.sqlite stores Site Preferences like the exceptions for cookies, images, pop-up windows, and software installation

Arafat_AAK said

If I backup the permissions.sqlite file then all my cookies are backed up too?

No. cookies.sqlite has the cookies. permissions.sqlite has site-specific permissions like whether and what kind of cookies the site is allowed to set.

I see cookies.sqlite. But I also see cookies.sqlite-wal, cookies.sqlite-shm, and cookies.sqlite.bak. Which one should I backup?

You should only backup cookies.sqlite. When you would restore cookies.sqlite then you need to remove existing temporary SQLite files cookies.sqlite-shm and cookies.sqlite-wal.

Did you close Firefox when you found cookies.sqlite-shm and cookies.sqlite-wal because these files would be removed when you close Firefox?

So you mean that I should only save cookies.sqlite and permissions.sqlite file. So think that I have saved these two files into my online drive, now I'm using another computer and I have downloaded those two files from Onedrive, now tell me how will I get my cookies back. Will I have to place these file in the profile folder or will I have to click them and do some installation?

You can copy the cookies.sqlite and permissions.sqlite files to the current profile folder while Firefox is closed to replace the currently present files.

You can use this button to go to the current Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

Close Firefox after you have opened the profile folder via the "3-bar" menu button > Exit (Power button) or "File > Exit".

So you mean that I copy cookies.sqlite and permissions.sqlite files then I clear my cookies. And then I go to the profile folder and replace these two files with the cookies.sqlite and permissions.sqlite files that are there, right?

With Firefox closed replace those two files. Then restart Firefox.

Of course you may get slightly unpredictable or unexpected results with changing the cookies and permissions back to those from a later date.

(#answer-860227} I don't think that cookies could be a cause for Firefox being slow unless you have extensions that deal with cookies. A large history is a much more likely cause for Firefox being slow. ....