Examine source code of bengreenier-tabsaver

{
  "manifest_version": 2,
  "name": "bengreenier-tabsaver",
  "version": "1.3",
  "description": "A simple tab saver",
  "homepage_url": "https://github.com/bengreenier/tabsaver",
  "icons": {
    "48": "icons/iconmonstr-bookmark-32-48.png",
    "96": "icons/iconmonstr-bookmark-32-96.png"
  },
  "permissions": [
    "tabs",
    "bookmarks",
    "idle"
  ],
  "browser_action": {
    "default_icon": "icons/iconmonstr-bookmark-32-48.png",
    "default_title": "Force Save Tabs"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec76ae3e-1ec9-4fba-9980-e78d1b911326}",
      "strict_min_version": "55.0"
    }
  }
}