Examine source code of Power Tabs

{
  "manifest_version": 2,
  "name": "Power Tabs",
  "version": "1.8.1resigned1",
  "homepage_url": "https://github.com/Rapptz/power-tabs",
  "description": "Vertical tab groups with tab searching",
  "applications": {
    "gecko": {
      "id": "power-tabs@rapptz-addons.com",
      "strict_min_version": "57.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "tabs",
    "storage",
    "sessions",
    "webRequestBlocking",
    "webRequest",
    "history",
    "menus",
    "tabHide"
  ],
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Comma"
      },
      "description": "Opens the Power Tab menu."
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "Opens the Quick Group Switcher."
    },
    "switch-1": {
      "suggested_key": {
        "default": "Alt+Shift+1"
      },
      "description": "Switch to first group."
    },
    "switch-2": {
      "suggested_key": {
        "default": "Alt+Shift+2"
      },
      "description": "Switch to second group."
    },
    "switch-3": {
      "suggested_key": {
        "default": "Alt+Shift+3"
      },
      "description": "Switch to third group."
    },
    "switch-4": {
      "suggested_key": {
        "default": "Alt+Shift+4"
      },
      "description": "Switch to fourth group."
    },
    "switch-5": {
      "suggested_key": {
        "default": "Alt+Shift+5"
      },
      "description": "Switch to fifth group."
    },
    "switch-6": {
      "suggested_key": {
        "default": "Alt+Shift+6"
      },
      "description": "Switch to sixth group."
    },
    "switch-7": {
      "suggested_key": {
        "default": "Alt+Shift+7"
      },
      "description": "Switch to seventh group."
    },
    "switch-8": {
      "suggested_key": {
        "default": "Alt+Shift+8"
      },
      "description": "Switch to eighth group."
    },
    "switch-9": {
      "suggested_key": {
        "default": "Alt+Shift+9"
      },
      "description": "Switch to ninth group."
    },
    "switch-10": {
      "suggested_key": {
        "default": "Alt+Shift+0"
      },
      "description": "Switch to tenth group."
    },
    "switch-prev": {
      "suggested_key": {
        "default": "Alt+Shift+PageUp"
      },
      "description": "Switch to previous group."
    },
    "switch-next": {
      "suggested_key": {
        "default": "Alt+Shift+PageDown"
      },
      "description": "Switch to next group."
    },
    "new-group": {
      "suggested_key": {
        "default": "Alt+Shift+Insert"
      },
      "description": "Create and switch to new group."
    },
    "switch-active": {
      "suggested_key": {
        "default": "Alt+Shift+Home"
      },
      "description": "Switch to last active group."
    }
  },
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "background": {
    "page": "background/listen.html"
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "sidebar_action": {
    "default_title": "Power Tabs",
    "default_panel": "sidebar/main.html",
    "default_icon": "icons/icon.svg",
    "browser_style": true
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/icon.svg",
    "default_title": "Power Tabs"
  },
  "web_accessible_resources": [
    "background/confirm.html"
  ]
}