Yep that web HUD lasted about 2 minutes on my hard drive. And what is the use of having tyre pressure adjustment and temp data when we don't have IMO values......and what are the temp readings anyway? Surface, core?? Rant over
We do already have IMO readings in game, although not in Web HUD. However, that was just RRE's own take on the concept - there are now several other third party apps that do a similar thing, some of which do show IMO values. I'm still checking these out, but I suspect they will have a similar performance hit. I do like some of the enhanced timing screens and delta times showing for practice though - helpful to show where you're gaining and losing time - but I'll probably stick with the default HUD for races.
However I have also started to use Second Monitor, which is not a web overlay so doesn't have the same performance hit, but does show IMO readouts and a lot more besides. Detailed telemetry screens also, although haven't looked into those yet. I already have two monitors connected to my pc for other stuff, so works great for me, but you could also use a spare laptop eg if you have one.
Look in the Community Workshop on the official forum if you want to check out any of these:
https://forum.sector3studios.com/index.php?forums/community-workshop.73/