Examine source code of Marka

{
  "name": "Marka",
  "version": "15",
  "description": "Web Page Marker, Keyword Highlighter, Saver",
  "permissions": [
    "storage",
    "activeTab",
    "http://*/*",
    "https://*/*",
    "file://*/*"
  ],
  "browser_action": {
    "default_title": "Marka",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "inc/icon16.png",
      "32": "inc/icon32.png",
      "48": "inc/icon48.png",
      "64": "inc/icon64.png",
      "128": "inc/icon128.png"
    }
  },
  "icons": {
    "16": "inc/icon16.png",
    "32": "inc/icon32.png",
    "48": "inc/icon48.png",
    "64": "inc/icon64.png",
    "128": "inc/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "vars.js",
        "lib.js",
        "menu.js",
        "keywords.js",
        "marker.js",
        "page.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "all_frames": true
    },
    {
      "js": [
        "save.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ]
    }
  ],
  "web_accessible_resources": [
    "help/index.html",
    "help/*.png"
  ],
  "manifest_version": 2
}