Examine source code of Spotiffer

{
  "manifest_version": 2,
  "author": "Jamie Schembri",
  "homepage_url": "https://github.com/shkm/spotiffer",
  "name": "Spotiffer",
  "version": "0.1.10resigned1",
  "description": "Opens music in Spotify.",
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6f2cc60-5318-4d6b-9ccf-63ae7746d5d5}"
    }
  },
  "permissions": [
    "notifications",
    "cookies",
    "*://*.bandcamp.com/*",
    "*://open.spotify.com/*"
  ],
  "background": {
    "scripts": [
      "background/authorize.js",
      "background/main.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.bandcamp.com/*"
      ],
      "js": [
        "content/bandcamp.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "Spotiffer"
  }
}