Examine source code of rimgo (Farside)

{
  "name": "rimgo",
  "description": "Use rimgo instead of Imgur.",
  "version": "1.5",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko_android": {},
    "gecko": {
      "id": "{c29f5416-192d-42ab-9da0-b4a82418752b}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "256": "rimgo.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.imgur.com/*"
  ]
}