You're looking for information on the Nokia Xpress Browser version 2.3, specifically a JAR download link from Google. Here's what I could gather:

The query centers on "Nokia Xpress Browser," a piece of software that was revolutionary in its time. Developed initially by Nokia (and later maintained by Microsoft Mobile), Xpress Browser was an essential tool for users in developing markets and those with limited data plans. Unlike modern browsers that render entire web pages on the device, Xpress Browser utilized server-side compression. It would squeeze website data through Nokia’s servers, stripping away heavy images and unnecessary code, and delivering a compressed, streamlined version of the page to the phone. For a user in rural India, Nigeria, or Brazil relying on a 2G EDGE network, this technology was not just a convenience; it was the difference between being online and being offline. It made the web affordable and accessible on devices that cost a fraction of an iPhone.

Installation: Transfer the .jar file to your phone's memory card via USB or Bluetooth, then open it from your phone’s file manager to install. Compatible Devices:Supports classics like the Nokia 5130 XpressMusic Go to product viewer dialog for this item. 2700 Classic Go to product viewer dialog for this item. , 6300, and the Asha series.

To download the Nokia Xpress Browser version 23 JAR file, you can use the following link: