Reproduction steps:
1. Install Unity Hub
2. Click Sign In
3. In the app browser, enter your details
4. Click Continue or Return

Expected results: App browser buttons work, letting users log in or exit the sign in window
Actual results: App browser buttons don’t work, meaning the users can’t sign in

Reproduced with: 3.6.0, 3.7.0 (user tested versions)
Couldn’t reproduce with: 3.5.2 (user tested version, opens the default browser window instead of in-app browser)

Reproduced on: Linux Mint, Ubuntu Budgie 23.10 (user tested)
Not reproduced on: Ubuntu 23.10, Ubuntu 22.04.3 (CQA tested)

Note: CQA couldn’t reproduce this issue in a Linux Mint and Ubuntu Budgie VM, as Unity Hub always opened the default external browser window instead of in-app browser