Examine source code of Behind The Overlay Revival

{
  "name": "Behind The Overlay Revival",
  "short_name": "BOR",
  "description": "__MSG_extensionDescription__",
  "version": "1.8.3",
  "developer": {
    "name": "Iván Ruvalcaba",
    "url": "https://gitlab.com/ivanruvalcaba/BehindTheOverlayRevival"
  },
  "default_locale": "en",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{c0e1baea-b4cb-4b62-97f0-278392ff8c37}",
      "strict_min_version": "59.0"
    }
  },
  "permissions": [
    "activeTab",
    "menus",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "js/background.js",
      "js/overlay_remover.js",
      "js/options.js",
      "js/options-l10n.js"
    ]
  },
  "icons": {
    "48": "img/logo.svg",
    "96": "img/logo.svg"
  },
  "commands": {
    "removeOverlay": {
      "suggested_key": {
        "default": "Alt+Shift+X"
      },
      "description": "__MSG_suggestedKeyTitle__"
    }
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "img/light_icon_browser_action.svg",
      "32": "img/light_icon_browser_action.svg"
    },
    "default_title": "__MSG_defaultPageActionTitle__",
    "theme_icons": [
      {
        "light": "img/dark_icon_browser_action.svg",
        "dark": "img/light_icon_browser_action.svg",
        "size": 16
      },
      {
        "light": "img/dark_icon_browser_action.svg",
        "dark": "img/light_icon_browser_action.svg",
        "size": 32
      }
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "19": "img/light_icon_page_action.svg",
      "38": "img/light_icon_page_action.svg"
    },
    "default_title": "__MSG_defaultPageActionTitle__"
  },
  "options_ui": {
    "page": "html/options.html"
  }
}