Examine source code of Standard Notes Clipper

{
  "manifest_version": 2,
  "name": "Standard Notes Clipper",
  "description": "Web clipper for Standard Notes",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html?route=extension"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "content_security_policy": "default-src 'self'; script-src 'self' 'wasm-eval' 'wasm-unsafe-eval'; worker-src blob:; connect-src * data: blob:; style-src 'self'; frame-src * blob:; img-src * data: blob:;",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f917dfe-accd-4d3a-9685-33c3ac0ca643}",
      "strict_min_version": "48.0"
    }
  },
  "version": "1.1.475"
}