Examine source code of TranLex

{
  "manifest_version": 2,
  "name": "TranLex",
  "version": "1.0",
  "description": "Adds a small translation hint to the highlighted word",
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self'; upgrade-insecure-requests;",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "app.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{633ff43f-7577-4342-877f-80337cec85ac}"
    }
  }
}