Examine source code of Dark View

{
  "manifest_version": 2,
  "name": "Dark View",
  "short_name": "__MSG_description__",
  "description": "__MSG_description__",
  "default_locale": "en",
  "version": "2.0.2resigned1",
  "author": "Light Alex",
  "options_ui": {
    "page": "options.html",
    "browser_style": false,
    "open_in_tab": true
  },
  "homepage_url": "https://addons.lightalex.com/#darkview",
  "icons": {
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "256": "icons/256.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/popup_dark_16.png",
      "24": "icons/popup_dark_24.png",
      "32": "icons/popup_dark_32.png"
    }
  },
  "background": {
    "scripts": [
      "files/script/background.js"
    ]
  },
  "commands": {
    "toggle-addon": {
      "suggested_key": {
        "default": "Alt+X"
      },
      "description": "__MSG_keyToggleAddon__"
    },
    "minus-dark": {
      "suggested_key": {
        "default": "Alt+Comma"
      },
      "description": "__MSG_keyMinusDark__"
    },
    "plus-dark": {
      "suggested_key": {
        "default": "Alt+Period"
      },
      "description": "__MSG_keyPlusDark__"
    }
  },
  "permissions": [
    "tabs",
    "*://*/*",
    "file:///*",
    "browsingData",
    "cookies",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*",
        "file:///*"
      ],
      "css": [
        "files/css/main.css"
      ],
      "js": [
        "files/script/preload.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{915326ba-42cd-4e33-bc0c-1957cdb0d497}"
    }
  }
}