fix: remove deprecated background.scripts from manifest v3

[KaraSara-jevo]

Summary

Remove deprecated background.scripts from the Manifest V3 configuration.

Changes

• Removed background.scripts from manifest.json
• Kept background.service_worker unchanged

Reason

Manifest V3 does not support background.scripts.

The extension showed the warning:

background.scripts requires manifest version of 2 or lower

during local testing in Microsoft Edge.

Testing

• Loaded extension as unpacked extension in Edge
• Reloaded extension after the change
• Verified the warning no longer appears

[ImprovedTube2]

thank you @KaraSara-jevo
the github version has this for testing with Firefox.

An option for Edge can be added to our build.py
https://github.com/code-charity/youtube/blob/master/build/build.py

(Are you could generated an improvedtube_edge.zip with releases as we do for Safari already. We also looking forward to publish some store versions automatically one day)

[hkzo]

Hi @ImprovedTube2,

I looked into how the shared manifest.json is processed for each browser/store package, because I wanted to better understand the release flow.

My current understanding is:

• The source manifest.json currently has both background.service_worker and background.scripts.
• build/build.py removes service_worker for Firefox builds, but the Chromium build path does not seem to remove scripts.
• The Chrome and Edge store packages I checked already have scripts removed and contain only service_worker.
  Checked package versions: Chrome 4.2081, Edge 4.2028, Firefox 4.2028.

If the intended solution is to update build/build.py, I think this would probably go in the existing chromium() build path so it applies to Chromium-based packages such as Chrome and Edge. Since the published Chrome/Edge store manifests already have background.scripts removed, I mainly want to make sure this would not conflict with any existing release/store-submission step.