Why would you want to use Textmarker on pages that frequently change their text content? Doesn't make any sense to me. You can opt-out of automatic content script loading and decide yourself for each website to load Textmarker or not. Also, this skyrocketing CPU usage can't be reproduced - neither by me nor by users who help me testing. So, if you want to enjoy free open-source software with less bugs then helping the devs in supplying detailed bug reports would be more efficient than letting the world know about what'd be acceptable and what not. Cheers.