[idoubtit]

When the content is static, adding so much JS and CSS weaken the website for no good reason. There will be more bugs and annoyances after this redesign.

Now, scrolling MDN is sluggish with Vivaldi (YMMV). This is so annoying that I had to disable JS on MDN. I hope they'll fix this, but the amount of CSS and JS is probably too high to fix performance regressions.

From my browser console:

    [Violation] 'scroll' handler took 561ms
    [Violation] Forced reflow while executing JavaScript took 565ms

With Firefox, the scrolling is generally quicker, though irregularly. But jumping to the top of the page leaves some elements of the page completely white for half a second.

Disabling JS fixes most of those annoyances, but I'll have to enable it for some documentation examples.