Webpost protection rules utilize a browser plugin. Currently only IE and Firefox plugins are available with DLPE 9.3. DLPE 9.4 will have a chrome plugin allowing web post protection rules. DLPE 9.4 is currently in limited controlled release. If you require access to the controlled release of DLPE 9.4, please contact Intel Security Technical Support.
Do you know when DLPE 9.4 will be available for production release?
DLPE 9.4.0 although is a production release but will remain as a limited controlled release and is not scheduled to be placed on the download site. The DLPE 9.4.1 is currently scheduled to release in Q4 which will be available via the download site.
version 10 is released and Chrome still not supported!!!
What makes you think Chrome isn't supported? I can find 10 mentions of Chrome in the Endpoint DLP 10.0 Product Guide, including the ability to specify which versions of Chrome you want to support in your environment.
Please, check the next article: KB88322
This is an expected behavior because every update of Google Chrome make changes around how they process their information through post method, and McAfee may not be able to release patches with the same frequency as Google does.