User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Firefox/60.0 Build ID: 20180605171542 Steps to reproduce: I've upgraded to macOS 10.14 Beta (18A293u) and intermittently my address bar will stop giving historical suggestions based on the text I type. I use this feature multiple times per hour, so it's very obvious when it doesn't work. I originally thought it was the extension I had enabled (https://twitter.com/IfErrThrowBrick/status/1006570442444898304) but now appears to be related to timing. If I restart Firefox, for the first minute or so the feature will work. However, given enough time it will stop working. I've tried using the "refresh" option to blow away local settings to no avail. This is the about:support info - https://gist.github.com/chamons/e04b59171f6f1f4edd971df613b196c3 I am uncertain that it's related to 10.14, but I had not seen it before upgrading. I'm a programmer by trade, so I'm happy to try things / provide additional info as needed. Actual results: Historical suggestions in the address bar stop working after some time. Expected results: Historical suggestions should always work, or at least prompt when broken.

do you type in the address bar when this happens, or do you just click the dropdown icon on it?

I hit this by typing, and can reproduce it 100% of the time. Clicking the dropdown icon shows zero items as well.

I've found a very strange "work around", if I create a new window (but not new tab) then suggestion starts working for 10-30 seconds before breaking again.

Confirming this bug, since it see it in the second beta of 10.14. For me it happens when I type in the address bar, and I can confirm that opening a new window seems to work as a workaround. Is there some logging we could get out of the browser console that might help?

I forgot to mention that on my machine I see this using the latest 63 nightly as well as Firefox 62.0b3 (20180625141512). I haven't yet been able to reproduce it on Developer Edition 62.0b3 (20180625141512).

Hello, I'm having the same issue. It works the first time I open Firefox (61 and latest nightly) and then stops working afterwards until I quit Firefox and try again. Tried to "repair firefox" without any results.

Are you on Mac OS 10.14 as well?

Yes

The bug affects Developer Edition 62.0b3 too (from my side)

Stephen, this sounds like a pretty serious widget layer issue - do you have time to take look at this on OSX 10.14?

I got this problem as well. It surfaced immediately after I installed 61.0, which was immediately after I installed the MacOS 10.14 beta. And yes, the "workaround" by opening a new window works for a few seconds.

Does the browser console (shift + cmd + J) display any errors related to our code right after this starts occurring? Or, if you run Firefox from Terminal, does it display any errors when this starts occurring? I will try to reproduce as well.

For anyone experiencing this bug, please test on the latest Mac OS seed and report back as to whether you are still seeing the issue. Thanks.

Marcia, I'm on 18A314k, last public Mojave release. Experiencing it with Firefox Beta 62 and Firefox Nightly 63.0a1 (2018-07-06).

I just installed the latest Mojave beta (18A326h) and it's still happening on 61.0.1. I keep getting this in the browser console: [Show/hide message details.] [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIDOMWindowUtils.addSheet]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: resource://gre/modules/ExtensionUtils.jsm :: runSafeSyncWithoutClone :: line 63" data: no]

Confirm. Same situation