bookmarks and history: places.sqlite
   favicons: favicons.sqlite
   bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
   cookies.sqlite for the Cookies
   formhistory.sqlite for saved autocomplete Form Data
   logins.json (encrypted logins) and key4.db (encryption key/primary password) for logins saved in the Password Manager
   cert9.db for certificates stored in the Certificate Manager
   persdict.dat for words added to the spell checker dictionary
   permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
   sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder) 

I have recently purchased a new Windows 11 computer, and want to install Firefox there and transfer all my bookmarks, passwords, etc. There are obviously quite a few Support articles on this topic, and seemingly quite a few methods to use: copy and paste profile folder, sync, the backup/restore function within Settings, etc. I'm a bit reluctant to use sync, as some users report it can be an incomplete transfer. My current profile also may contain some "corruption", so I'm reluctant to copy the entire profile folder to the new computer. Comments by esteemed and superb contributor cor-el in this Support article: [[https://support.mozilla.org/en-US/questions/1454070]] therefore may be my best option. He wrote: '''''Note that best is to avoid restoring a full profile folder and only restore important files that are safe to restore/transfer. bookmarks and history: places.sqlite favicons: favicons.sqlite bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder cookies.sqlite for the Cookies formhistory.sqlite for saved autocomplete Form Data logins.json (encrypted logins) and key4.db (encryption key/primary password) for logins saved in the Password Manager cert9.db for certificates stored in the Certificate Manager persdict.dat for words added to the spell checker dictionary permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences) sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder) ''''' My questions are: 1. Why is it "best is to avoid restoring a full profile folder"? 2. Is this the complete list of "important files that are safe to restore/transfer"? 2. In my profile folder, there are several files that start with the same file name, but then have different file extensions. For example: cookies.sqlite, cookies.sqlite.bak, cookies.sqlite-shm, cookies.sqlite-wal. Should I restore ALL these files, or just "cookies.sqlite"? 3. Is the correct procedure to copy the selected files from the "old" profile, and then paste them to the "new" profile, which presumably would overwrite files of the same name in the "new" profile? Thanks! (Apologies for any formatting, bold text, and italicized test oddities. I selected these options for parts of this text, but am not sure I did that correctly. It would be very helpful if a question/message could be previewed prior to sending!)