Examine source code of Acronymify

{
  "description": "Acronymify recognizes your acronyms on the web.",
  "manifest_version": 2,
  "name": "Acronymify",
  "version": "2.0.3",
  "author": "Léon Davidovski",
  "homepage_url": "https://github.com/l-dav/Acronymify",
  "icons": {
    "32": "icons/abc_icon_32.png",
    "48": "icons/abc_icon_48.png",
    "64": "icons/abc_icon_64.png",
    "128": "icons/abc_icon_128.png"
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "storage",
    "unlimitedStorage"
  ],
  "browser_action": {
    "default_icon": "icons/abc_icon_48.png",
    "theme_icons": [
      {
        "light": "icons/abc_icon_32.png",
        "dark": "icons/abc_icon_32.png",
        "size": 32
      },
      {
        "light": "icons/abc_icon_48.png",
        "dark": "icons/abc_icon_48.png",
        "size": 48
      },
      {
        "light": "icons/abc_icon_64.png",
        "dark": "icons/abc_icon_64.png",
        "size": 64
      },
      {
        "light": "icons/abc_icon_128.png",
        "dark": "icons/abc_icon_128.png",
        "size": 128
      }
    ],
    "default_title": "Acronymify",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "acronymify@technologyandstrategy.com"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      }
    }
  },
  "options_ui": {
    "page": "option_page/option.html",
    "open_in_tab": true,
    "browser_style": true
  }
}