Examine source code of Selection Search

{
  "name": "Selection Search",
  "version": "0.9.8.1",
  "manifest_version": 3,
  "description": "Search for the selected text in search engines",
  "minimum_chrome_version": "102",
  "browser_specific_settings": {
    "gecko": {
      "id": "selection-search@myr1.net",
      "strict_min_version": "115.0"
    }
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      }
    }
  },
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "common/browsersupport.js",
      "common/urlparse.js",
      "common/encoding.js",
      "common/actionutils.js",
      "background/sync.js",
      "background/storage_local.js",
      "background/storage.js",
      "background/iconloader.js",
      "background/contextmenu.js",
      "background/actionutils.js",
      "background/locking.js",
      "background/background.js",
      "background/click-counter.js",
      "background/blacklist.js",
      "background/copy-to-clipboard-ff.js",
      "background/init.js",
      "background/default_style.js",
      "background/service_worker.js"
    ]
  },
  "action": {
    "default_popup": "browseraction/popup.html",
    "default_icon": {
      "16": "img/icon16.png",
      "48": "img/icon48.png",
      "128": "img/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "common/browsersupport.js",
        "popup/popup.js",
        "popup/popup_modifier.js",
        "popup/circular_popup.js",
        "popup/activators.js",
        "common/actionutils.js",
        "popup/selection_util.js",
        "popup/actions.js",
        "popup/style.js",
        "popup/button.js",
        "common/encoding.js",
        "popup/event_utils.js",
        "common/urlparse.js",
        "common/jquery-3.6.4.min.js",
        "old/engine-editor.js",
        "old/extractform.js",
        "popup/positioning.js",
        "popup/autohide.js",
        "popup/search_engine_hotkeys.js",
        "popup/init_script.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    },
    {
      "matches": [
        "http://mycroftproject.com/*",
        "https://mycroftproject.com/*"
      ],
      "js": [
        "common/browsersupport.js",
        "old/opensearch.js",
        "sites/mycroft.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "contextMenus",
    "storage",
    "notifications",
    "clipboardWrite",
    "tabs"
  ],
  "host_permissions": [
    "https://s2.googleusercontent.com/s2/favicons*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "old/postsearch.html",
        "old/postsearch.js",
        "old/encoding-search.html",
        "old/encoding-search.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ]
    },
    {
      "resources": [
        "img/icon16.png",
        "img/icon48.png",
        "img/icon128.png",
        "img/close.png",
        "img/ajax-loader.gif",
        "img/default_favicon.png",
        "img/copy.svg",
        "img/folder.svg"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ]
    }
  ]
}