Examine source code of Sticky Notes

{
  "name": "StickyNotes",
  "version": "1.2.6",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "sticky@filenamezero.dip.jp"
    }
  },
  "permissions": [
    "contextMenus",
    "storage",
    "notifications",
    "tabs",
    "activeTab",
    "webNavigation",
    "*://stickynotes.kumabook.tokyo/*"
  ],
  "background": {
    "scripts": [
      "background/bundle.js"
    ]
  },
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "match_about_blank": true,
      "css": [
        "content_scripts/sticky-view.css"
      ],
      "js": [
        "content_scripts/bundle.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options_ui/index.html"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/icon-32.png",
    "default_title": "StickyNotes",
    "default_popup": "popup/index.html"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "19": "icons/create-icon-19.png",
      "38": "icons/create-icon-38.png"
    },
    "default_title": "Create new sticky",
    "show_matches": [
      "*://*/*"
    ]
  },
  "sidebar_action": {
    "default_icon": "icons/icon-32.png",
    "default_title": "StickyNotes",
    "default_panel": "sidebar/index.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "MacCtrl+Shift+S"
      },
      "description": "Show stickies on sidebar"
    },
    "create_sticky": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "MacCtrl+Shift+C"
      },
      "description": "Create a sticky in active tab"
    },
    "toggle_stickies": {
      "suggested_key": {
        "default": "Ctrl+Q",
        "mac": "MacCtrl+Q"
      },
      "description": "Toggle visiblities of stickies in active tab"
    }
  },
  "web_accessible_resources": [
    "content_scripts/delete.png",
    "content_scripts/delete-hover.png",
    "content_scripts/menu.png",
    "content_scripts/menu-hover.png",
    "content_scripts/edit-tag.png",
    "content_scripts/edit-tag-hover.png",
    "content_scripts/minimize.png",
    "content_scripts/minimize-hover.png",
    "content_scripts/color.png",
    "content_scripts/page-option.png",
    "content_scripts/back.png",
    "content_scripts/close.png"
  ]
}