Tab import doesn't work in Arc browser

[tapjtap]

Short description

Tab Session Manager fails to import tabs from any source, be it from a Tab Session Manager created .json backup or with the "Import URL List" option.

Steps to reproduce

1. Start Arc Browser.
2. Install Tab Session Manager.
3. Open two new tabs, any website.
4. Navigate to Tab Session Manager manage page.
5. Click "Export" in the "Export Session" section, save file anywhere.
6. Close the two tabs created in Step 3.
7. Click "Browse" in the "Import sessions" section, Open the .json file created in Step 5.
8. Click "Import" in the "Import sessions" section.
9. Observe output.
10. Type https://www.google.com into the "Import URL List" text box, Click "Import".
11. Click "OK" on the "Sessions Imported" dialog window.
12. Observe output.

Expected result

The tabs in either the .json file or the manually entered list should open in new tabs.

Actual result

No response. No tabs are created upon importing through either method.

Platform information

• Platform (OS): Windows 11 Enterprise
• Browser: Arc Browser
  • Build Info: 1.5.0.31351 (0000)
  • OS Version: 10.0.22621
  • Chromium Engine Version 125.0.6422.142
• Version of Tab Session Manager: 7.0.1

Additional context

I was originally trying to move my open tabs from Firefox over to Arc using Tab Session Manager which is available in both the Firefox Web App store and the Chrome Web App store, so my first import attempt was using a .json created with the Firefox version of Tab Session Manager. I tried to create a .json with the Chrome version in Arc second using the process listed above and observed the same issue.