STABLE version -- 5.1.1130.129

[Bolt]

I agree. I thought I was the only one with this problem.I also have a new stable version (5.1.1130.82) installed  that works much slower (sites open very slowly), all old versions of the browser with the same profile work much faster, I don't know what this is related to.

Install the Page load time extension. Download the page from the web in different browser versions, find out the download time. Compare the results with each other. To confirm your words, post screenshots with the results. But so far there is no evidence. The usual chatter. I don't have slow operation in the latest version of the browser.