Firefox reset preferences (including add-on data, scripts, etc) after a (presumed) crash, how do I get back my data?
I hibernated my (Win 10 Laptop) computer while I moved from one place to another with my Firefox open and when I went to turn it back on it initialised as if it were booting up. Which, you know, fair, computers crash. Except when I loaded my Firefox it gave me 3 tabs: my session restore (thankfully I didn't loose any of my hundreds of tabs), and two tabs as if I were installing firefox for the first time. My add-ons and configurations for my toolbar were reset to default, so I lost all my scripts, my hundreds of RSS feeds managed through FeedBro and my many custom filters through uBlock.
Is there any way to restore my data? I singed back in to sync hopeful it'd restore my data from its backups but it did not. Looking over my Firefox syncs accounts this appears to assume that its the same profile as before. Any help would be appreciated, this is years of data lost to the aether...
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Look on your desktop. Do you see a folder called; Old Firefox? Look inside. Look for the folder with the latest creation date.
https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible
There is no such folder. However, I do have a copy of my profile from about a week ago: would this restore my add-on’s data if I were to replace my current profile with it? My configurations? Would it load my tabs from back then? My Browsing history?
Sorry, computer was sick.
Warning ! ! Only Copy the files you are told. We will avoid anything that might cause problems. Here is the list of files;
cookies: cookies.sqlite Do not bother. Cookies will be created when you return to the website. However, you will have to log in everywhere. And you may lose any settings that websites store on your computer.
extensions(add-ons, themes): it would be better to download them fresh. If you need to remember what add-ons you had, open the extensions sub-folder and look at the .xpi files ++++++++++++++++++++++++++++++++ logins.json and key3.db [v58+]key4.db : These are the password files. Copy Both !
persdict.dat : custom dictionary - words you added to the dictionary
mimeTypes.rdf [v55+]handlers.json : What to do with what type of file.
places.sqlite : History and Bookmarks.
prefs.js : Your settings. Note: If you were having problems, this could be contaminated.
cert8.db [v58+]cert9.db and possibly cert_override.txt : Stores all your security certificate settings and any SSL certificates you have imported into Firefox. If removed, the cert8.db, cert9.db file will be replaced.
search.json.mozlz4 : file stores the user-installed search engines that are available in the Firefox v47+
search.sqlite file and searchplugins folder store the search engines that are available in the Firefox Search bar before Firefox v47 +++++++++++++++++++++++++++++++++++++++++++++++++ Copy these files from the old to the new. You may get a message that the files already exist. Choose to over-write for each file.