Examine source code of In My Pocket

{
  "manifest_version": 2,
  "name": "In My Pocket",
  "version": "0.13.0",
  "description": "For all people who are missing the old Firefox Pocket addon, here is an unofficial client for the Pocket service. My goal is to provide a useful, but still lightweight means to access your Pocket account from your browser. Enjoy!",
  "homepage_url": "https://inmypocketaddon.com",
  "icons": {
    "48": "assets/icons/icon-48.png",
    "96": "assets/icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd7e22de-2e34-40f0-aeff-cec824cbccac}",
      "strict_min_version": "62.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "contextMenus",
    "notifications",
    "storage",
    "tabs",
    "webRequest"
  ],
  "background": {
    "scripts": [
      "./background/sentry.js",
      "./background/background.js",
      "./background/upgrade.js",
      "./background/context_menus.js",
      "./background/page_actions.js",
      "./background/keyboard.js",
      "./background/uninstall.js"
    ]
  },
  "options_ui": {
    "page": "./options/options.html"
  },
  "sidebar_action": {
    "default_panel": "popup/popup.html?ui=sidebar",
    "default_icon": "assets/icons/browser-action-light.svg",
    "open_at_install": false
  },
  "browser_action": {
    "default_icon": "assets/icons/browser-action-light.svg",
    "theme_icons": [
      {
        "light": "assets/icons/browser-action-dark.svg",
        "dark": "assets/icons/browser-action-light.svg",
        "size": 16
      },
      {
        "light": "assets/icons/browser-action-dark.svg",
        "dark": "assets/icons/browser-action-light.svg",
        "size": 32
      }
    ],
    "default_popup": "./popup/popup.html?ui=popup"
  },
  "page_action": {
    "default_icon": "assets/icons/page-action-disabled.svg",
    "default_title": "Add to pocket"
  },
  "commands": {
    "toggle-page-status": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Adds the current page to the item list, or archive it if it's already there"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Q"
      },
      "description": "Open Pocket list in popup"
    },
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+Shift+Q"
      },
      "description": "Open Pocket list in sidebar"
    },
    "open-first-item": {
      "suggested_key": {
        "default": "Alt+F"
      },
      "description": "Opens the first item of the list"
    },
    "open-random-item": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "Opens a random item of the list"
    }
  }
}