I believe the latest updates for Firefox made some changes so that a fixed background image in a WordPress cover block does not stay fixed. It used to work about 2 weeks ago, now it does not. But, the fixed background behaves as expected in MS Edge. https://www.cemalekin.com/test/layout-test/ https://www.cemalekin.com/test/test-page/ In the first linked page there is one such block, in the second one there are two. None works in Firefox, either on my Surface Book 2 laptop or my desktop with a 27" monitor. The same pages will show the expected behavior when viewed in MS Edge. I tried the following: * Restarted FF with all the add-ons disabled * Refreshed Firefox * Removed the entire custom CSS from the site * Tried different themes Nothing made any difference. I have been a Firefox user for a long time and do not want to switch. I also want the visitors using Firefox be able to have the same experience. Any suggestion to fix this problem will be much appreciated. Or a repaired version of Firefox release will be most welcome. Thank you.