![]() ![]() Tabs that are closed and more then set in _tabs_undo (since Firefox ?).Tabs/windows that are closed a long time before, set in _closed_after (target for Firefox 32).Pages loaded after, that are more then set in _serialize_forward (since Firefox 30).Pages loaded before, that are more then set in _serialize_back (since Firefox 30).Form data (for the case of a browser or system crash).Loaded pages before and after (back and forward buttons).Closed windows and tabs (closed tabs, tabs in closed windows, closed tabs in closed windows).This page is about documenting things progressively. For this reason, it is undergoing major refactorings and redesigns. It was designed a long time ago, when users only had a few tabs, when DOM Storage didn't exist and before people started uploading Gigabytes of data. This service is extremely useful but is also quite expensive. Session Restore is the service that saves the state of Firefox while the user is browsing so as to be able to restore it after a shutdown or a crash. 6.5 Forgetting closed tabs/windows when Firefox closes normal.6.4 Forgetting closed tabs/windows after a time.5.2.5 Binary format that can be loaded/modified piecewise.5.2.4 Save separately index (one file), tabs (one file per tab).5.2.3 Journalize files, consolidate them on idle-daily and shutdown.2.4 Data we forget on a manual close of the browser.1 What is Session Restore, why this page?.jsonlz4) in order to properly rename the backup files. ‡ Please note: You may need to ensure that your file system viewer is not hiding the file extensions of known types (like. If you feel that you are more prone to losing your session - sessions with lots of tabs may fall into this category - or would just like insurance, the Tab Session Manager helps keep sessions safe. Rename ‡ the file to sessionstore.jsonlz4.Copy your chosen file into the the main profile folder.(Don't stress on this, you can perform this procedure multiple times.) If the most recently modified is particularly small in size compared to others, it may be mostly blank and you'll want to use the bigger one. Review the files in this folder by date modified (you can ignore their names, any files at all in this folder should be restorable).Navigate to the sessionstore-backups backup folder you made.Moving rather than deleting is a precautionary step. Move the file called sessionstore.jsonlz4 to another location (like your desktop). ![]() Make a copy of the sessionstore-backups folder.A filesystem view of your profile folder will show up. Go to about:support in your location bar and click on the Open Folder button in the Profile Folder line.If you are on one of these versions replace all instances of. Note: Versions of Firefox 55 and lower use the older filetype. If a session is lost, hopefully the restore page opens automatically, but if not go to about:sessionrestore in the location bar. Here's a primer on recovering from that.Įdit: This post can now be found on Mozilla's support site (with screenshots!). Firefox's tab session saving function is pretty robust, however there are special situations where a browsing session may be lost (often when the process gets killed while shutting down, a la Windows 10 update). ![]()
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