Examine source code of MyBoard Quicksave

{
  "name": "MyBoard Quicksave",
  "description": "Save links to your MyBoard boards even faster with one click",
  "homepage_url": "https://myboard.co",
  "version": "1.0.2",
  "manifest_version": 2,
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "images/16.png",
      "32": "images/32.png"
    },
    "default_title": "Save current page to MyBoard",
    "theme_icons": [
      {
        "light": "images/16.png",
        "dark": "images/16.png",
        "size": 16
      },
      {
        "light": "images/32.png",
        "dark": "images/32.png",
        "size": 32
      }
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "icons": {
    "16": "images/16.png",
    "24": "images/24.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "96": "images/96.png",
    "128": "images/128.png",
    "512": "images/512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{42620e90-e17a-4553-a989-316c833370d3}"
    }
  }
}