Examine source code of jPlus beta

{
  "name": "jPlus beta",
  "description": "Additional functionality and improvements for your Atlassian JIRA Project Management Software (v6.3.8+).",
  "version": "2.0.0.5resigned1",
  "manifest_version": 2,
  "page_action": {
    "default_icon": "img/icon/jplus_96.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "declarativeContent",
    "tabs",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "scripts/jquery-3.1.1.min.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "scripts/jquery-3.1.1.min.js",
        "content.js"
      ],
      "css": [
        "styles/plus.css",
        "styles/quick-jump.css",
        "styles/right-click.css"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "img/icon/jplus_16.png",
    "32": "img/icon/jplus_32.png",
    "48": "img/icon/jplus_48.png",
    "96": "img/icon/jplus_96.png",
    "128": "img/icon/jplus_128.png",
    "256": "img/icon/jplus_256.png",
    "512": "img/icon/jplus_512.png"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "web_accessible_resources": [
    "jira-modifications/jplus-global.js",
    "jira-modifications/sprint-view.js",
    "jira-modifications/definition-of-done.js",
    "jira-modifications/definition-of-ready.js",
    "jira-modifications/quick-jump-navigation.js",
    "jira-modifications/backlog-view.js",
    "jira-modifications/backlog-right-click-extend.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2580b25c-0623-4576-8a60-d19e398e833e}"
    }
  }
}