Yes, Quebecguy - another one of the great mysteries of life. I have three browsers here on my Apple. Safari, Opera & FireFox. It's just exactly to counteract what you have experienced. Some browsers work better on certain sites - some simply don't work at all on some sites. AND - I will occasionally drop one browser, for a while, and add another.
I've found that having multiple browsers is a great benefit. I can be doing something on one - need added info - open a second browser - find the info and use it to complete whatever on the first browser/site.
Glad you were able to get everything back working. Don't fret the small things - there are plenty of fish(browsers) out there to choose from.