Examine source code of Purplemonkey2

{
  "name": "Purplemonkey",
  "version": "2.20.0",
  "manifest_version": 2,
  "description": "Violentmonkey with more unsafe api",
  "author": "gholk",
  "homepage_url": "https://github.com/GHolk/violentmonkey/tree/purple-monkey",
  "icons": {
    "16": "public/images/icon16.png",
    "48": "public/images/icon48.png",
    "128": "public/images/icon128.png"
  },
  "default_locale": "en",
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "public/images/icon16b.png",
      "32": "public/images/icon32b.png"
    },
    "default_title": "Purplemonkey",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "content_security_policy": "script-src 'unsafe-eval' 'self'; object-src 'self'",
  "options_ui": {
    "page": "options/index.html#settings",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "js": [
        "injected-web.js",
        "injected.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "permissions": [
    "tabs",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "notifications",
    "storage",
    "unlimitedStorage",
    "clipboardWrite",
    "contextMenus",
    "cookies"
  ],
  "commands": {
    "_execute_browser_action": {},
    "dashboard": {
      "description": "__MSG_menuDashboard__"
    },
    "settings": {
      "description": "__MSG_labelSettings__"
    },
    "newScript": {
      "description": "__MSG_menuNewScript__"
    },
    "SkipScripts": {
      "description": "__MSG_skipScripts__"
    },
    "updateScripts": {
      "description": "__MSG_updateScriptsAll__"
    },
    "updateScriptsInTab": {
      "description": "__MSG_updateScriptsInTab__"
    }
  },
  "minimum_chrome_version": "61.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "purple-monkey@gholk.github.io",
      "strict_min_version": "58.0"
    }
  }
}