message: feat(devtools): updating firefox manifest json file
  Updating `manifest.json` file for firefox.
  PR Close
diff: "manifest_version": 2,
  "short_name": "Angular DevTools",
  "name": "Angular DevTools",
  - "description": "Angular DevTools extends Chrome DevTools adding Angular specific debugging and profiling capabilities.",
  + "description": "Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities.",
  "version": "1.0.4",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "icons": {
  