Detailed information about the Add-on can be found in the wiki. There's also this long-form article.

• Clone the repository
• npm install
• npm run dev

• npx web-ext run -s dist
  • starts the default system Firefox with a temporary profile, loads the Add-on and watches for changes
  • append -p profilename to start Firefox with a specific profile

or

• Open about:debugging and Load Temporary Add-on which is located in the dist directory

Check about:debugging and click Inspect to the right of Temporary Containers to see the console.

• Once: npm test
  • Shows a coverage summary and generates a detailed report in the coverage directory
• Watcher: npm run watch:test

• Bump manifest version
• Commit, tag and push
• Upload zip web-ext-artifact to AMO
• Download published AMO xpi
• Create and publish GitHub release with AMO xpi

• Bump manifest version
• Commit and push
• git tag v1.0beta1
• git push origin v1.0beta1
• git log $(git tag --sort=-version:refname | sed -n 2p)..HEAD --pretty=format:%s
• Add release notes and publish

Vue.js and SemanticUI are used for the preferences & popup UI.

MIT