Examine source code of Simple Context Share

{
  "manifest_version": 2,
  "version": "7.5.0",
  "name": "Simple Context Share",
  "short_name": "Simple Share",
  "description": "Share to Facebook, Twitter, Gmail and more using the context menu",
  "author": "Carlos Jeurissen",
  "homepage_url": "https://apps.jeurissen.co/",
  "developer": {
    "name": "Carlos Jeurissen",
    "url": "https://apps.jeurissen.co/"
  },
  "content_security_policy": "default-src 'none'; child-src 'none'; manifest-src 'none'; media-src 'none'; object-src 'none'; worker-src 'none'; connect-src 'none'; frame-src 'none'; font-src 'self'; script-src-elem 'self'; style-src-elem 'none'; img-src data:; script-src 'self'; script-src-attr 'none'; style-src 'self'; style-src-attr 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; block-all-mixed-content; upgrade-insecure-requests; report-uri https://api.jeurissen.co/reports/csp/webext/scs/v5_1_5/",
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-context-share@apps.jeurissen.co"
    }
  },
  "externally_connectable": {
    "accepts_tls_channel_id": false
  },
  "icon_variants": [
    {
      "16": "/images/extension/icon-16.png",
      "32": "/images/extension/icon-32.png",
      "48": "/images/extension/icon-48.png",
      "96": "/images/extension/icon-p96.png",
      "128": "/images/extension/icon-p128.png"
    }
  ],
  "permissions": [
    "contextMenus",
    "notifications",
    "storage"
  ],
  "background": {
    "page": "/views/background.html",
    "persistent": false
  },
  "commands": {
    "_execute_browser_action": {
      "description": "Activate the extension"
    }
  },
  "options_ui": {
    "browser_style": false,
    "open_in_tab": true,
    "page": "/views/options.html"
  },
  "icons": {
    "16": "/images/extension/icon-16.png",
    "32": "/images/extension/icon-32.png",
    "48": "/images/extension/icon-48.png",
    "96": "/images/extension/icon-p96.png",
    "128": "/images/extension/icon-p128.png"
  },
  "options_page": "/views/options.html",
  "browser_action": {
    "browser_style": false,
    "icon_variants": [
      {
        "16": "/images/extension/icon-16.png",
        "32": "/images/extension/icon-32.png",
        "48": "/images/extension/icon-48.png"
      }
    ],
    "default_icon": {
      "16": "/images/extension/icon-16.png",
      "32": "/images/extension/icon-32.png",
      "48": "/images/extension/icon-48.png"
    }
  },
  "applications": {
    "gecko": {
      "id": "simple-context-share@apps.jeurissen.co"
    }
  }
}