Examine source code of URLs Add On

{
  "manifest_version": 2,
  "name": "URLs Add On",
  "version": "1.5",
  "description": "Copies all the links from all opened tabs.",
  "applications": {
    "gecko": {
      "strict_min_version": "58.0a1",
      "id": "{42480b17-dad9-4455-b032-89ba97726e34}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "clipboardWrite",
    "notifications",
    "menus",
    "*://*/*"
  ],
  "icons": {
    "128": "icons/Urls Add On Icon.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "URLs Add On",
    "default_popup": "menu.html",
    "default_icon": {
      "128": "icons/Urls Add On Icon.png"
    },
    "theme_icons": [
      {
        "light": "icons/Urls Add On Icon.png",
        "dark": "icons/Urls Add On Icon.png",
        "size": 128
      }
    ]
  }
}