Webview2 processes persist after closing the pdf files

[jackylai111]

After opening and closing a pdf file, the webview2 process continues to run in the background, and the number of processes accumulate with the number of pdf opened. In the screenshot, I opened and closed 4 pdf files and 4 webview2 processes corresponding to the pdf files persisted, along with the main webview2 process (the quicklook preview window had been closed but the main process was running in the background). This means that over time a large number of webview2 processes would accumulate and use up RAM and CPU.

[emako]

I'll think about how to fix it