I’ve just found them yesterday, this is a very useful plug-in for your web browser which speed it up using some features. Here is the introduction from Gears.google.com.

Gears is a plug-in that extends your browser to create a richer platform for web applications. For example, webmasters can use Gears on their websites to let users access information offline or provide you with content based on your geographical location. To install Gears, visit http://gears.google.com

It enables more powerful web applications, by adding new features to your web browser:

  • Let web applications interact naturally with your desktop
  • Store data locally in a fully-searchable database
  • Run JavaScript in the background to improve performance

So you may take a try for this ^^