Prep Firefox for mv3

[filiptronicek]

Description

Support for manifest v3 in Firefox has been here for a while and so is their support for optional_host_permissions.

How to test

• Package the extension for Firefox

pnpm build --target=firefox-mv3
pnpm package --target=firefox-mv3

• Load it as a temporary addon in about:debugging
• Make sure it still injects the Gitpod button on GitHub and that you can add https://bitbucket.gitpod-dev.com/repos?visibility=public as an additional domain by clicking on the cog in the extensions dropdown and choosing the "Enable Gitpod on this domain" option (this is the part checking if optional_host_permissions works properly)

[Copilot]

Pull Request Overview

This pull request updates the extension build and release process to support Firefox MV3 instead of MV2.

• Updated build and packaging commands in the README for Firefox MV3.
• Modified temporary addon file names and release instructions in the README.
• Revised the GitHub workflow (.github/workflows/submit.yml) to build and package the extension for Firefox MV3.

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
README.md	Updates to commands and release instructions for Firefox MV3
.github/workflows/submit.yml	Workflow updates to build and package the extension for Firefox MV3

Files not reviewed (1)

• scripts/firefox-mv2.sh: Language not supported

[mustard-mh]

Works like a charm!

GitHub	BitBucket