Some RT search links not working on Firefox 43, but working fine on IE 11 and Chrome

FF43 seems to (sometimes) strip all the = symbols out of a search URL.
Anyone have any idea why? The same URL when copied and pasted to IE or
Chrome works just fine.

Many of my searches work just fine when they’re in a dashboard, but if I
try to open (some of them) to do a bulk update - then I get an error
like this (as you can see - at least all = symbols have been stripped):

Other searches work fine in FF. All searches work fine in IE and Chrome

Jon ‘Boli’ Copeland
Systems Engineer
IT Sales & Services Ltd