hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here...

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Hello. Indeed in Safe Mode the Location Bar works as expected. I have disabled Universal Search provided by Test Pilot as this I have not installed any addon in the last 14 day but noticed Tab Center has received a new look a few days ago. Thank you.

sap7772000 said

Hello. Running NIghtly 32bit ver. 51.0a1 (2016-08-11/ This issue occurred 3-4 days ago: there is no error message, no warning, nothing, pressing Enter or pressing on the horizontal arrow (Go to the address in the Location Bar) has no effect. You can see a sample in this video( https://www.wetransfer.com/downloads/cdce66b8abe1bf90513c16b6d588ac9b20160812105127/147d393b39c373072b2a464ea59b59f220160812105127/07e839 - valid for 7 days ), for all address entered I pressed first on Enter and then on the arrow. The only workaround is using the search engine. Thank you.

Same behaviour on x64 WITH T/P enabled

If you want to be a Nightly channel Tester then a place to hang out with other Testers is in http://forums.mozillazine.org/viewforum.php?f=23

Note your support.mozilla.org account will not work there as you will have to create a new account on forums.mozillazine.org if you do not have one and first post needs approval before posting normally.

James said

If you want to be a Nightly channel Tester then a place to hang out with other Testers ...

If I mostly use Nightly for all my browsing :-) does that make me a Nightly tester?

Well the Nightly development channel builds are not meant to be used like a Release but for testing. Nightly along with Aurora channel gets checkins almost everyday and as a result gets a update each of those days. This can sometimes cause issues until it is finished, fixed, or reverted.

...I understand but that's how I'm happily using it, that is in most of the time. I have also back-up browsers so I'm fine like that. Thanks.