Tabs Outliner has the potential to be the best browser tool that Google never built -- but you obviously don't have the time to maintain it -- why not open source the project? Many developers like myself would be interested to contribute bug fixes and improvements. It would make the tool much more powerful for users.
I understand that you would like to get paid for your work, but it seems you need a different business model than you currently have to keep up with technical issues like memory consumption, crashes, etc. Consider open sourcing this, and let the developer community help you!
Customer support service by UserEcho