My "recovery.jsonlz4" file from a previous install will not reopen my previous session (tabs) after the new installation. Before deleting my previous installation of Firefox (for a clean install), I did two things: I created a restore point, and I did a backup of my old data. The data consists of: bookmarks-2024-05-10.json These folders: C:\Users\[machinename]\AppData\Local C:\Users\[machinename]\AppData\Roaming C:\Computer Files\Mozilla Firefox\distribution C:\Program Data\Mozilla-1de4eexxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Within "Roaming" I have Firefox\Profiles\xxxxxxxx.default-release\sessionstore-backups In that sessionstore-backup, I have a "recovery.baklz4" (most recent session, I'm guessing) and three others that look like "upgrade.jsonlz4-2024xxxxxxxxxxx With Firefox closed, I took a copy of "recovery.baklz4" (745 KB) and pasted it into the current sessionstore-backups file, then I changed the file to "recovery.jsonlz4". I thought that when I reopened Firefox, my previous tabs would appear. They didn't. So, I went to the menu, then to History, and clicked on Recover Previous Session. That didn't do anything either. And it reduced the size of the *.jsonlz4 file from 745 KB to 6 KB. I'm not sure what I've done wrong. Can you help me out? Thank you. Frank