How about the option to install on hard drive or memory card . And option to set as default browser. Great app , you did a great job on this.
I choosed to limit the installation to the main memory for two reasons: 1. all WM devices released on market in the last 3 years generaly have enough space memory and you can install many apps to this location, and 2. Opera Mini works better when installed into the main memory. You'll notice that using a browser installed on storage card also increases your battery consumption and makes your device to heat more rapidly.
I do however plan to release a storage card version, in order to satisfy more tastes; also, the default browser feature will soon be added.