Examine source code of Side Translate

{
  "author": "igorlogius",
  "homepage_url": "https://github.com/igorlogius",
  "description": "Translation addon that requires minimal permisisons that allows translation of selected text and also includes a translation history",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_area": "navbar"
  },
  "sidebar_action": {
    "default_icon": "icon.png",
    "default_panel": "sidebar.html"
  },
  "icons": {
    "64": "icon.png"
  },
  "manifest_version": 2,
  "name": "Side Translate",
  "permissions": [
    "storage",
    "menus",
    "unlimitedStorage"
  ],
  "version": "1.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4aee219e-fbc1-4fdc-a58c-8fe27c3828f8}"
    }
  }
}