Examine source code of Custom Loop

{
  "manifest_version": 2,
  "name": "Custom Loop",
  "version": "2.7resigned1",
  "description": "Loop portions of html5/webm/other videos and audio",
  "homepage_url": "https://github.com/losnappas/Custom-Loop",
  "icons": {
    "16": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "web_accessible_resources": [
    "img/check.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ded849d1-2726-4b6f-b964-aa5e980a8aeb}"
    }
  }
}