Hi there! I'd like to propose my services to develop a custom Chrome extension that works on WhatsApp Web and provides all the features you said.
I have extensive experience in developing Chrome extensions and have successfully delivered similar projects for other clients.
The Chrome extension will be designed to monitor incoming messages on WhatsApp Web and detect messages containing specific keywords. The messages will then be highlighted, and the extension will save them in your account. You will be able to access the saved messages at any time and also manage your settings from the extension's user interface.
I can ensure a smooth and efficient development process, with quick turn-around time. Please let me know if you're interested, and we can discuss the project further. Thank you for considering my proposal!