Examine source code of DoucheBlock for Twitter

{
  "name": "__MSG_appName__",
  "short_name": "__MSG_appShortName__",
  "description": "__MSG_appDescription__",
  "homepage_url": "https://github.com/MobileFirstLLC/doucheblock",
  "version": "1.3.1",
  "manifest_version": 2,
  "default_locale": "en",
  "minimum_chrome_version": "31",
  "permissions": [
    "webRequest",
    "storage",
    "https://*.twitter.com/*"
  ],
  "icons": {
    "128": "assets/128x128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.twitter.com/*"
      ],
      "exclude_globs": [
        "https://twitter.com/settings/blocked/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/16x16.png",
      "24": "assets/24x24.png",
      "32": "assets/32x32.png"
    },
    "default_title": "__MSG_appName__"
  },
  "applications": {
    "gecko": {
      "id": "{ff553cf8-6edd-4a73-8541-d5b42ed657dd}",
      "strict_min_version": "42.0"
    }
  },
  "incognito": "spanning"
}