NB! DO NOT USE THIS GARBAGE OF an addon. Yesterday received some update and today months of work is gone forever - no DB backup no nothing! It is not coded well at all!

I DID not refreshed my Firefox, neither did some kind of cleaning of the browser or Windows whatsoever.

What a f%#king shame !!!

I do not see any reason why is recommended app by Firefox, when I read that clearly I'm not the only one affected.

And please developers, don't say it is Firefox fault. It is not the only add-on we use. You can read firefox code, and fix your own!

Suddenly all my tabs were gone. Poof, deleted from the list.

Still having catastrophic data loss every few months. Been this way for years. Garbage

All saved tabs deleted after update. More than slightly upset.

Deleted all my tabs without saving, after new update, tabs do not show up in Onetab window. This problem is on Zen Browser

Deleted all my tabs when firefox updated, thousands of tabs. When I reached out to support they gave me info for chrome.
RE: Developer response
I do not have "system cleaner" or "privacy cleaner" software installed. This is quite frankly a cop out. Your product sucks and you know it.

1. If any application (including browser addons) does not have an OFFLINE import-export-backup function, it has no value to me, does not follow good practices and is poorly designed.

2. Cloud sync may be OPTIONAL for users who clearly need it.
Full import-export (containing complete data to restore the previous state, folders, groups, stars, pins, tasks, etc.) locally to the file is the foundation.
Cloud here, cloud there, some clouds everywhere, but a large group of users do not use clouds for everything (many use self-hosted) and must have access to file backup.

3. Currently, it is not possible to return to v1 as a workaround -> v2 should not be released because it is incomplete.

4. Do not install v2 if you plan to reinstall the OS soon, because you will lose the ability to export your OneTab bookmarks!
I was going to install a new OS in the coming days and now I can't transfer my bookmarks.

Maybe need to look for another addon?

PS: The current look and new features are great, but the lack of FULL file export-import is a bummer...

Newest update wiped years of accumulated tabs. The developer has taken no responsibility. Changed the way they save tabs, don't test it, and wipe user's existing tabs without making a backup first?

DO NOT TRUST these developers.

Closed multiple windows without warning immediately after installing. DO NOT INSTALL.

Lost all stored tabs over one update.
Become worst than useless overnight.

Down from five star because without warning, this stupid developer destroyed YEARS of accumulated saved tabs. The updated version DID NOT EVEN WORK it tried to show something but could only give me the start of a menu with flashing dots at the left as if it was doing something. Thank God there are other options for this functionality because I'm never going to trust this developer with my data ever again AND YOU SHOULDN'T TRUST THEM EITHER.

New update deleted ALL my tabs, with no warning. Insanity. How could you forget to write a migration script that imports the HTML to the new format!?

went from a 5-star extension to a 1-star (I'd give it minus 5 if I could) simple cause of the sh***y update that center-alligned everything without an option to revert it back to left allignment

STOP MESSING WITH HOW I WANT THINGS TO LOOK AND FEEL!!!
The new "ui update" is horrid, wastes so much "screen estate", and suffers from the same typical garbage "fluffy rounded cloudy corners and seperating things with 5 billion wasted pixel-space between each section" -.-

Exported tabs, uninstalled, reverted back to old version and disabled updates...

I love it on Windows, but on Android I have over 100 tabs open and it only offers to save one tab. Which makes it kind of useless.

do NOT use this extension. I have a 32core Threadripper with 128G RAM and it still crashed trying to restore 960 tabs. Thankfully I already made a backup. Task Manager never showed FF using more than 32G of RAM, so it is the extension and not Windows running out of memory

I'm writing this on my phone while I wait for the extension to restore all the tabs in my PC (so that I can delete the extension).

I expected it to be bad but I decided to give it a try since it was a recommended extension. I certainly didn't expect it to hog all my RAM and make my system unusable

I eventually got it to collect all open tabs into one but it did not allow to restore them again. Cleared all, restarted pc and the same thing. Seems it does not work that well

why does this extension constantly duplicate itself? without fail it will show up as two of itself running in the task bar, one of them will work and one will not. It can only be fixed by uninstalling the addon. This has happened easily 6+ times, this is reoccurring and repeatable.

Why do all the links I've saved always disappear suddenly and randomly?