Updated to 98.0.2 last night or this morning, and now videos that are attached to or included in emails do NOT open/do not play. They worked fine before. Happening in both gmail and Yahoo! mail (sbcglobal.net). [I don't use Chrome nor Edge] I checked the download file; nada. Message from FF is "failed" Other MP4, WAV files etc. open an play fine - but Not if they are in an email UPDATE 3/27/22 1913HRS. Just returned from my other residence; my wife's PC is still using 98.0 or 98.0.1 and it played the videos just fine. Only difference between our PC's is her's uses an 990x mobo and a GTX 960/4GB video card. UPDATE 3/28/22 1047a.m. pst. Cannot download anything using Firefox 98.0.2. Just tried to download a short clip; Failed. Video drivers from NV website; Failed. A couple other things earlier but don't remember what nor where they were. Edge downloaded the video drivers just fine (again, had to dl to disc enable to use them.) jonzn4SUSE - did you get my email and have you had any luck ( or the time to do it) finding the problem/solution??? 3/30/22, I just did a refresh of Firefox, it did not correct the problem. IS there any "easy way" to roll-back to version 98.0.1 4/10/22: I found the solution on my own after several hours of searching. Open "about:config", click "Accept the risk and continue" button; at the top click/select "show all". Find highlighted "browser.download.improvements_to_download_panel". Change setting to '''false'''bold text'''''' Thank you to the web site Techdows; solution was published on 3/4/2022. https://techdows.com/2022/01/firefox-97-download-flow-changes.html