Firefox extension authenticates successfully but does not capture page content

[punk-dev-robot]

Description

The Firefox browser extension builds, installs, and authenticates via GitHub credentials without errors, but does not send any page content to the service.

Steps to reproduce

1. Install the Firefox extension
2. Authenticate using GitHub credentials (succeeds)
3. Navigate to any page
4. Observe that no content is sent

Expected behaviour

After authentication, the extension should capture and send page content.

Notes

• Chrome has not been tested
• Authentication appears to complete successfully — the issue is limited to content capture

[linear]

ENG-577