PixelBlock – Gmail extension that blocks email open tracking(chrome.google.com)

    var matches = document.querySelectorAll('a[href*="www.google.com/url?q="]');
    
    // remove all google spying	redirects
    for (var i = 0; i < matches.length; i++)
    {
      if (/^(https?:\/\/(www\.|encrypted\.)?google\.[^\/]*)?\/?url/.test(matches[i])) {
        var match = /[\?&](url|q)=(.+?)&/.exec(matches[i]);
        if (match != null) {
          matches[i].href = unescape(match[2]);
        }
      }
    }