IMPORTANT: These instructions are only for Chrome version 137 and lower. Do not try this with Chrome version 138 or higher, as it will leave you stuck with a broken extension installation.

If your browser is years out of date, then it will not work with newer versions of OneTab. This may leave you in a situation where you have data stored in OneTab, but OneTab is no longer compatible with the old browser you are running it on.

The easiest way to solve this problem is to update to the latest version of Chrome. To do this, go to the "About Chrome" menu option.

If you cannot update Chrome, then these instructions will help you export the tabs you had stored in OneTab.

These instructions will NOT help with general data loss issues, they are only for situations where OneTab does not run any more because of a very old browser that cannot be updated.

Important: Do not attempt to uninstall and re-install OneTab. This will cause data loss

1. Using Chrome, please download this file to your Chromebook: datadump-1.1.zip.
2. Extract the contents of the zip file. Make a note of the location you extracted it to
3. In Chrome, go to this URL:   chrome://extensions
4. Enable developer mode using the button in the top-right of that page
5. Do NOT remove OneTab, as this will cause data loss. Instead, press the toggle switch to temporarily disable it.
6. Click "Load unpacked extension", and choose the datadump directory that you extracted at step 2. Then ensure that the datadump extension is enabled. It is normal for a "Manifest V2 deprecation" warning to appear.
7. If it works, an Icon with the letter "D" will appear where the OneTab icon normally appears in your browser toolbar. Click on the "D" icon to see a list of your stored tabs
8. After you've made a copy of your list of tabs, you can import it into OneTab on a different computer by using the Import/Export feature inside OneTab on that computer.
9. Finally, switch off the Chrome developer mode by clicking the toggle button in the top-right of the screen