Examine source code of BlaBlaHelp

{
  "manifest_version": 2,
  "name": "BlaBlaHelp",
  "version": "1.1",
  "author": "SOMBRUN Wilka",
  "background": {
    "scripts": [
      "index.js"
    ]
  },
  "permissions": [
    "contextMenus"
  ],
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}