Examine source code of TextMarker Go

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{cd6c4ebf-366e-45a0-98b5-b8217288eed7}"
    }
  },
  "author": "SUN Chun-Yen",
  "name": "Textmarker Go",
  "version": "0.10resigned1",
  "default_locale": "en",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "/icons/icon.svg",
    "96": "/icons/icon.svg"
  },
  "browser_action": {
    "default_icon": "/icons/icon.svg",
    "browser_style": true,
    "default_title": "__MSG_browserActionTitle__",
    "default_popup": "/popup/popup.html",
    "theme_icons": [
      {
        "light": "icons/icon-light.svg",
        "dark": "icons/icon.svg",
        "size": 16
      }
    ]
  },
  "commands": {
    "mark-text": {
      "suggested_key": {
        "default": "F9"
      },
      "description": "Use the default color to mark the selections"
    },
    "mark-text-ctrl": {
      "suggested_key": {
        "default": "Ctrl+F9"
      },
      "description": "Use the second color to mark the selections"
    },
    "mark-text-shift": {
      "suggested_key": {
        "default": "Shift+F9"
      },
      "description": "Use the third color to mark the selections"
    },
    "clear-all-marks": {
      "suggested_key": {
        "default": "Ctrl+Shift+F9"
      },
      "description": "Clear all the marks"
    },
    "go-to-mark": {
      "suggested_key": {
        "default": "F2"
      },
      "description": "Go to mark"
    }
  },
  "background": {
    "scripts": [
      "colors.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "textmarkergo.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "/options/options.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ]
}