Examine source code of Save to Discord

{
  "description": "Sends the current URL to a Discord channel",
  "manifest_version": 2,
  "name": "bookmark-to-discord",
  "version": "1.0",
  "homepage_url": "https://github.com/dmdboi/bookmark-to-discord",
  "icons": {
    "48": "icons/brand-discord.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "58.0",
      "id": "{aac0ce08-76a2-472a-8e21-bd2cfe30d2e1}"
    }
  },
  "background": {
    "scripts": [
      "storage.js",
      "entry.js"
    ]
  },
  "options_ui": {
    "page": "views/settings.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "page_action": {
    "default_icon": {
      "16": "icons/brand-discord.png",
      "48": "icons/brand-discord.png",
      "128": "icons/brand-discord.png"
    },
    "default_title": "Click to run function",
    "show_matches": [
      "<all_urls>"
    ]
  }
}