# Tab session manager no longer imports stored json session files + deletes all autosaved sessions

**URL:** <https://community.brave.app/t/tab-session-manager-no-longer-imports-stored-json-session-files-deletes-all-autosaved-sessions/651229>\
**Category:** Brave Browser\
**Tags:** windows, feedback, browser\
**Created:** [March 31, 2026, 7:23am UTC](https://community.brave.app/t/tab-session-manager-no-longer-imports-stored-json-session-files-deletes-all-autosaved-sessions/651229 "2026-03-31T07:23:10Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![289wk](https://avatars.discourse-cdn.com/v4/letter/2/439d5e/32.png) [@289wk](https://community.brave.app/u/289wk)\
**Post date:** [March 31, 2026, 10:14pm UTC](https://community.brave.app/t/tab-session-manager-no-longer-imports-stored-json-session-files-deletes-all-autosaved-sessions/651229/4 "2026-03-31T22:14:52Z")

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@OlafDeWit

BB user’s _PROFILE_ data, within a BB user’s profile folder (`Default` folder, Windows OS example):

- `%LOCALAPPDATA%\BraveSoftware\Brave-Browser\User Data\Default`

The following list of items, are known for being replaceable - BUT NO GUARANTEE OF SUCCESS:

- Bookmarks [JSON file]
- History [SQLite file]
- Login Data [passwords, SQLite file]
- Preferences [majority of browser settings, JSON file]
- 
- Sessions [folder ← do not copy]
- [but you can copy the Sessions and Tabs files:]
- Session file example: “Session\_13387619522050810” [SNSS file]
- Tabs file example: “Tabs\_13396004968468207” [SNSS file]
- 
- Top Sites [saved tiles on new tab page, SQLite file]
- Visited Links [binary file]
- Web Data [autofill data, SQLite file]

> **NOTES about all that...**
>
> NOTICE: Lots of info about Session [SNSS] files: ‘[https://digitalinvestigation.wordpress.com/tag/snss/](https://digitalinvestigation.wordpress.com/tag/snss/)’
> 
> NOTICE: Re `Session_13387619522050810` ← the long string of numbers are a date-and-time stamp. On a MacOS computer, the following command (`date -r 13387619522050810`) will reveal: `Thu Apr 6 12:40:10 EST 424238744`
> 
> NOTICE: View SQLite files by using `DB Browser for SQLite` [Link](https://sqlitebrowser.org/)
> 
> NOTICE: View JSON files by using `Visual Studio Code` [Link](https://code.visualstudio.com/Download)
> 
> NOTICE: View certain Chromium LevelDB databases, by using `LevelDB Viewer` [(GitHub](https://github.com/arkantos1482/leveldb-viewer))
> 
> NOTICE: A `Profile 1` folder, _for example_, cannot be replaced by a profile folder of another name (such as `Profile 2`). Same for the other BB user profile folders. **DO NOT CHANGE** the BB user’s profile folders names.
> 
> NOTICE: The most durable files, are `Bookmarks`, `Bookmarks.bak`. They can be copied between the BB user profile folders.
> 
> FILE AND FOLDER PERMISSIONS: See
> 
> - `https://community.brave.com/t/browser-wont-launch-after-install/606342/18`
> - `https://community.brave.com/t/brave-doesnt-start-when-i-run-it-as-administrator-and-brave-shield-doesnt-work/628494/41`

My consolidated notes re data loss that include info re maintaining data backups:

‘[Brave deleted all my active tabs and favorites - #2 by 289wk](https://community.brave.app/t/brave-deleted-all-my-active-tabs-and-favorites/646661/2)’

Because, best opportunity for swapping files, is within a Brave Browser version existance - date range envelope. Lately, such date range envelopes, have been very short.

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_[View the full topic](https://community.brave.app/t/tab-session-manager-no-longer-imports-stored-json-session-files-deletes-all-autosaved-sessions/651229)._