fix(browsers): fix panic when version compare fail

[joelwurtz]

I did not recall why exactly, but i have done this update in our forked repository as we were having a panic here in some user agent string (unfortunetaly i did not keep the user agent string responsible for this panic)

However it avoid a expect and simply ignore this error if it happens

[mindreader]

Nice catch.

[vanetix]

Thanks for this!