I still have the problem and do not know what to try next. I compared all variables and the values are the same. In fact, I have Firefox in a second computer with no sessions restoring problem. There is no "previous.jsonlz4" inside which seems weird.Ĥ) through about:config I checked that _from_crash was true. The new created folder, even after closing some new sessions, has only the "recovery.jsonlz4" and "recovery.baklz4" files. No successģ) I also deleted sessionstore-backups folder under my profile. Also tried to Settings > Privacy & Security > "Use custom settings for history" with "Always use Private Browsing mode" not checked.
#RECOVER SESSIONRESTORE JSONLZ4 WINDOWS#
What I've already tried or verified following the instructions of mozilla forum:ġ) Settings > general > “Open previous windows and tabs” is checked as it always have been I unchecked and and rechecked but nothing changed Ģ) Settings > Privacy & Security > “remember history” is selected. The option "Restore Previous Session" does not appear in the "3-bar menu > history" and it appears grayed in the History Firefox main menu. I changed nothing in the configuration and I don't remember I had a crash. recover.py recovery.jsonlz4 > done.Two days ago, my firefox browser started not restoring the previous sessions.
To tun, just pass the file path to the python script and it will output a html file with all the tabs urls (in a recursive tree structure if need be) My script will work with either recovery.jsonlz4 or recovery.baklz4 $FIREFOX_PROFILE/sessionstore-backups/recovery.jsonlz4 Are there recovery.jsonlz4 and recovery.baklz4 files created and updated in the sessionstore-backups folder in the Firefox profile. Only if the use 'Clear history when Firefox closes' to clear the history then this includes not creating a sessionstore.jsonlz4 file. You can find the recovery files in the sessionstore-backups folder in the Firefox profile dir: dialog to clear the browsing history manually shouldn't affect session restore.
#RECOVER SESSIONRESTORE JSONLZ4 TRIAL#
Enter python and the rest is a simple script (developed through trial and error) which extracts all urls from the open tabs (there is info about closed tabs in the sessionstore.jsonlz4 file as well but my script ignores those tabs). Given that this js implementation didn't work in my situation, I needed to come up with a solution which didn't crash if I needed to extract the urls from massive json files. The JSON data contained in those compressed files contain a rich detail about your session" which can be used to extract the urls. In Firefox 56+, the files are compressed using Mozilla's flavor of LZ4 compression (.jsonlz4 or. As the description on the tool says: "Firefox creates various session history files as you browse, and then at shutdown creates sessionstore.jsonlz4. It has a great interface but it's slow and has mostly crashed in my use cases (my compressed session files can sometimes be as big as 100mb). One such popular tool is the Session History Scrounger which was written in javascript and runs in the browser. This issue has led many to create their own tools to try and extract all those lost tabs (urls) manually. And so you sit there with all your tabs potentially lost forever. I could never figure out why (probably the size of the session-restore file grows so big that Firefox can't process) and eventually there is nothing Firefox can do. Having said all that, once in a while (and I used to really dread those moments when it happened), firefox is not be able to resore my crashed session (which might have involed 1000s of tabs that I kept opened, hoping to bookmark at some point). managing crashed sessions/tabs) which chrome eventually copied (even though it's still not implmented as well as ff) has been my bread and butter and why I've stuck with Firefox all these years.
Even if Firefox crashes, it always recovers nicely, restoring all the tabs that were open when the browser crashed (the crashed sessions can be stored recursivly which is the best featrure). NOTE: If you need to edit a JSONLZ4 file, you can use Firefox with the 'mozlz4-edit' add-on installed. Navigate to the JSONLZ4 file you want to restore then click Open. I also love that Firefox lets me keep all my tabs backed-up. Click the Import and Backup icon (appears as up and down arrows), then select Restore Choose File. restart browser and perform restore previous. It is a tad slower than some of the other browsers overall, but it makes it up with amazing extensions and great developer experience. i was already starting to check an old backup ( in favorites) and recent history to manually recover most. I know some folks love to hate on firefox, but as one of the only mainstream browsers that is not controlled by a big (evil) tech corp with various privacy/monopolistic concerns, it is my default browser. At any given time I might have 100s of tabs open across multipe Firefox windows.
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