Where I currently live and work there are restrictions on some protocols such as XMPP, so I can't use Pidgin or similar software anymore.
What is a reliable, web-based alternative to Pidgin that supports OTR?
Note: I am not looking for a self-hosted client.
OTR is not the only requirement but the most important one for me at the moment. I'll take any other XMPP extension as a bonus. Encrypted voice and video chat would be greatly appreciated but not essential, text chat being the primary function of the app.