Examine source code of Save SVG

{
  "manifest_version": 3,
  "name": "Save SVG",
  "description": "Save inline SVG images",
  "version": "0.2.3",
  "homepage_url": "https://github.com/martinthomson/save-svg",
  "icons": {
    "16": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{329e87da-d44d-4a01-80c3-9546759c0050}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "menus",
    "scripting"
  ]
}