bonjour
Following the update of Firefox (52), the identification form printUserLogin_out () in colorbox no longer works correctly:
All special characters (@, #, etc) block input and lose focus.
Note: it works correctly with chrome (54 or 57)
cordialement
rb

I just tried locally a password like $#123üöä and it seems to work in Firefox 52 for me. Or are you referring to the user name containing special chars?

Or are you referring to the user name containing special chars?
User names are mail addresses (mail@domain.com) and passwords can contain special chars (only those requiring the combination of keys with Alt Gr)
I use other forms on the site with jquery without problems
This problem does not appear by pasting the id and pass directly into the input field
My Operating system: ubuntu 16.04

It might be that Firefox now does not allow password forms being submitted via http. If you haven't setup your site to use https that could be it. I did test with a local server (Mac) which is also http of course but Firefox might make a difference here. However I think it should actually only warn in that case and not block right away. Sorry otherwise I have no idea especially if your install hasn't been changed.

Thank you for your answers
I tested with windows10 and FF52, it works correctly
Maybe there is a problem with the linux version of FF
mystery!

Yeah, if only all browsers on all systems would behave the same. Maybe a bug that sneaked in and the next update solves it. At least we generally don't have the good old "browser war" days anymore.