Examine source code of FFCSS-Enabler

{
  "author": "nickbooties@gmail.com",
  "manifest_version": 2,
  "name": "FFCSS-Enabler",
  "version": "1.0",
  "description": "Firefox screen-share enabler for the Chime WebApp",
  "icons": {
    "48": "ffcss-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ffcss-enabler@nickbooties"
    }
  },
  "permissions": [
    "https://*.chime.aws/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}