Examine source code of Ads hider for Gmail™

{
  "name": "Ads hider for Gmail™",
  "description": "Make content panel wider by hiding Gmail ads.",
  "content_scripts": [
    {
      "css": [
        "content_style.css"
      ],
      "matches": [
        "http://mail.google.com/*",
        "https://mail.google.com/*"
      ]
    }
  ],
  "icons": {
    "16": "gmail-no-ads-16.png",
    "48": "gmail-no-ads-48.png",
    "128": "gmail-no-ads-128.png"
  },
  "permissions": [
    "http://mail.google.com/",
    "https://mail.google.com/"
  ],
  "manifest_version": 2,
  "version": "0.2.0.10resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6be3e138-94ff-4d13-b28c-ed4973c8db75}"
    }
  }
}