Can no longer log into the Fidelity website with Firefox. I can with Edge and Duck, Duck, go

Posted the question a bit too fast. The solution to this was something I already knew but did not work through Firefox adequately. I always leave Firefox through the 3 bar application menu and scroll down to "Exit" and select it to close Firefox. My settings in Firefox is to clear all my history when exiting Firefox using the Exit selection (Note: using the "X" in upper top right corner of the window only closes the window. It does not execute what you want accomplished in the settings on exit.) Where I messed up is in my history of items to clear you have a box at the top for the period to clear, i.e., last hour, last 2 hours, ........Everything. I usually have it set to Everything, but this time it was set to last hour. Hence all in the last hour was cleared out, but older data was not, so when the Fidelity login came up it saw a lot of old data, cookies, cache, etc. and stumbled, then sent the "Can't complete action" message. Don't know how the history to delete period changed to last hour, perhaps it was the new version install, but when I set the delete period back to everything it all worked as expected and I could login.

Lesson learned. Hope this is of help for others.