Hello,
I have designed a few websites (with HTML5, CSS3, JavaScript). Because of the most extensions for Google Chrome & Firefox are made by using these languages it would no problem for me to release this project. It's also possible to make the extension in Python for example but the programming language Python isn't very fast compared to JavaScript. It isn't very difficult to count the syllables per word / word per sentences, that's the reason why I can complete this project within 3 days for the amount of 34 Euro. For the design I will send you any examples with different colors if you hire me. The extension will be compatible for Chrome as for Firefox. I hope we can release this project together and if you have any questions about something just send me a message in the chat.
I hope to hear from you soon,
Kobe Janssens