Examine source code of Website History Browser

{
  "name": "Website History Browser",
  "description": "a WebExtension to browse your history per website",
  "homepage_url": "https://github.com/maxlath/website-history-browser",
  "manifest_version": 2,
  "version": "1.5.0",
  "permissions": [
    "bookmarks",
    "history",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "history.svg",
    "32": "history.svg",
    "48": "history.svg",
    "96": "history.svg"
  },
  "browser_action": {
    "default_icon": "history.svg",
    "default_title": "Website History Browser",
    "theme_icons": [
      {
        "light": "history-light.svg",
        "dark": "history.svg",
        "size": 16
      },
      {
        "light": "history-light.svg",
        "dark": "history.svg",
        "size": 32
      },
      {
        "light": "history-light.svg",
        "dark": "history.svg",
        "size": 48
      },
      {
        "light": "history-light.svg",
        "dark": "history.svg",
        "size": 92
      }
    ]
  },
  "commands": {
    "open-website-history-browser-tab": {
      "suggested_key": {
        "default": "Ctrl+Alt+J"
      },
      "description": "Open website history browser tab"
    },
    "open-website-history-browser-tab-without-selecting-current-website": {
      "suggested_key": {
        "default": "Ctrl+Alt+H"
      },
      "description": "Open website history browser tab without selecting the current website"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8f2d1ef-1a55-4aab-9145-fdca2bdc7afb}"
    }
  }
}