Examine source code of Swift Selection Search

{
  "manifest_version": 2,
  "name": "Swift Selection Search",
  "version": "3.49.0",
  "description": "Swiftly access your search engines in a popup panel when you select text in a webpage. Context search menu also included!",
  "homepage_url": "https://github.com/CanisLupus/swift-selection-search",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "background": {
    "page": "swift-selection-search.html"
  },
  "applications": {
    "gecko": {
      "id": "jid1-KdTtiCj6wxVAFA@jetpack",
      "strict_min_version": "66.0"
    }
  },
  "options_ui": {
    "browser_style": true,
    "page": "settings/settings.html",
    "open_in_tab": true
  },
  "permissions": [
    "<all_urls>",
    "clipboardWrite",
    "contextMenus",
    "search",
    "storage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking"
  ],
  "optional_permissions": [
    "downloads",
    "tabs"
  ],
  "commands": {
    "open-popup": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space"
      },
      "description": "Open the popup (if text is selected)"
    },
    "toggle-auto-popup": {
      "suggested_key": {
        "default": "Ctrl+Shift+U"
      },
      "description": "Switch popup opening behaviour between \"Auto\" and \"Keyboard-only\""
    }
  },
  "web_accessible_resources": [
    "res/*"
  ]
}