Examine source code of ScreenRun

{
  "name": "ScreenRun",
  "author": "ScreenRun LLC",
  "manifest_version": 2,
  "version": "1.1.1",
  "description": "Quickly record a video of your tab with your voice and clicks and import into ScreenRun.app",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "screenrun.js"
      ],
      "all_frames": false,
      "run_at": "document_end"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "ScreenRun",
    "default_icon": "icons/off.png"
  },
  "icons": {
    "16": "icons/off.png",
    "48": "icons/off.png",
    "128": "icons/off.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f074fbda-2896-4c3b-9a6c-d4f24672800a}"
    }
  }
}