Thank you for your review and suggestions.
I'm sorry to hear about the slowdown issues you're experiencing. I will see what I can do to improve the speed (but is highly depends on the length of the word list and the webpage).
For the profile feature, the upcoming support for multiple keyword lists should address your needs. Stay tuned.
Regarding the color-coding for specific keywords, I'll see what can be done to implement this feature. [EDIT] Version 1.80 introduced color choices for individual words (and a faster search window).
Thank you again for your feedback!