Examine source code of Page Preserver

{
  "manifest_version": 2,
  "name": "Page Preserver",
  "version": "124",
  "description": "Preserve webpages forever: submit to Wayback Machine and browse existing archives.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c0191f39-af5e-4c28-a506-c370ce9b0923}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "res/icon16.png",
      "32": "res/icon32.png",
      "48": "res/icon48.png",
      "96": "res/icon96.png",
      "128": "res/icon128.png"
    },
    "default_title": "Page Preserver",
    "default_popup": "code/popup.html"
  },
  "icons": {
    "16": "res/icon16.png",
    "32": "res/icon32.png",
    "48": "res/icon48.png",
    "96": "res/icon96.png",
    "128": "res/icon128.png"
  },
  "permissions": [
    "tabs"
  ]
}