Session History Scrounger for Firefox

Firefox creates various session history files as you browse, and then at shutdown creates sessionstore.jsonlz4. In Firefox 56+, the files are compressed using Mozilla's flavor of LZ4 compression (.jsonlz4 or .baklz4 file extension). The JSON data contains rich detail about your session, but this page is targeted toward extracting just the page URLs.

Step 1: Load File

Drag and drop one session history file onto the empty text box (HELP), or use the Browse... button on the right. This file is not sent to the network, it is only read within this page in Firefox.

Note: To scrounge a different file, reload this page (Windows: Ctrl+r. Mac: Command+r). Or click the reload button in the address bar.

Step 2: Extract URLs / Save Session Links

HTML list options:  Include Closed Windows  Include Closed Tabs  Include Back-Forward History
Possibly buggy:  Expand Embedded Sessions

HTML list commands: Scrounge URLs (Fallback: Unstructured URL list) Save List

JSON file: Save Uncompressed JSON (sessionstore.js format) Save Embedded Session (first found only) Save Uncompressed JSON as text

Troubleshooting: If turning off options doesn't make this latest version work, try the archival "old logic" version at scrounger_old.html.