I'm having a problem with my macbook pro m1 pro, when I turn it on it starts to run slow and when I open the activity monitor I have at least 10 processes called "System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent" and "WebThumbnailExtension Web Content" I don't know what this is, I can't find a solution.
MacBook Pro 14″, macOS 15.0
I can produce this regularly by searching for kind:xls files and then having MacOS showing the Icon Preview.
The funny thing is that this appeared on both my computers at the same time, a Mac Studio, and a MacBookPro.
I believe there is a bug in the ICON PREVIEW generation for .xls files.
"....I believe there is a bug in the ICON PREVIEW generation for .xls files." seems correct
It seems to happen only when some excel type of files is open (whatever the program)
interesting, I tried your solution after returning to office but does not work for me, unfortunately.
I must admit that I had installed all kinds of things using homebrew.
I am not sure, but my feeling is that things got a bit better since the last "brew update; brew upgrade".
WebThumbnailExtension 100% cpu usage
