Closed Bug 1584761 Opened 3 years ago Closed 3 years ago

Firefox garbled on VMware Fusion 11.5


(Core :: Widget: Cocoa, defect)

69 Branch
Not set





(Reporter: mozilla-jrk, Unassigned)



(2 files)

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0

Steps to reproduce:

Running: VMwareFusion 11.5.0
Host & Guest O/S: Mojave.10.14.6 (18G103) [Second Security Update]
On: MacBook Pro (Retina, 15-inch, Mid 2014) with Built-In Display: 15.4-inch (2880 x 1800) -- Intel Iris Pro 1536 MB graphics

  1. Install Firefox on macOS Mojave running on VMware Fusion 11.5 (or, 11.1) downloaded from official Mozilla/Firefox download.

  2. Start Firefox by clicking on icon in /Applications in Finder

  3. Firefox takes entire desktop, showing only the middle of the FF browser window. Identical behavior in either Full Screen or Single Window view. Identical behavior across different macOS VMs.

  4. CMD-W closes windows okay.

  5. CMD-Q to close Firefox gives spinning-pinwheel-of-death. Must force-quit to exit Firefox.

Actual results:

See attachment.

Current version of Tor has the identical problem.

No other application I have tried has an issue. (Safari works fine.)

Expected results:

Should have been able to use Firefox.

Hi @JK, what operating system did you choose by installing the VMware Fusion 11.5.0?

Flags: needinfo?(mozilla-jrk)

Host O/S: macOS 10.14.6
Using VMware 11.5, I created a new VM using the Mac OS 10.14 template, and installed from an ISO created from the Install macOS version 14.0.22. I then applied the Mojave updates which included the second 10.14.6 security update.

Most apps run okay on the VM. Firefox is the one major exception.

I have two VM issues I have not been able to resolve that may or may not be related to this problem:

  1. The login dialog box is microscopic, and no amount of manipulation of the display settings seems to change it, either in single window or full screen. Likewise, the clock is microscopic (~/< 1pt) in the upper right of the login window.

  2. The pointer is always off. To "click" on something, you need to put the neck of the arrow of what you wish to click, not the point of the arrow.

Please let me know if you need additional information.



Flags: needinfo?(mozilla-jrk)

Hi @JK, Tks for the info provided. Based on you've said in comment 2, I will set a component to the issue, if isn't a proper one please fell free to change it. In my end I have problem installing VMware Fusion 11.5.0. If I will succeed I'll let you know.
Further, I'll hope that someone from dev's team will give us a hand with the issue.

Component: Untriaged → Layout
Product: Firefox → Core

Is there any chance to run mozregression to see what broke it (if anything)? Though given it's in Tor it's likely not to be a recent regression at all...


Sorry for the slow reply. Been doing some testing. I skipped around going back to older FF releases, and all seemed to have the same problem. So, I decided it had to have something to do with my VM. So, I build a new VM from scratch, and then messed with the Display settings. I was FINALLY able to track down the problem.

On a MBP with native Display resolution:
Built-in Display
15.4-inch (2880 x 1800)
NVIDIA GeForce GT 750M 2 GB graphics

I found ONE configuration that allowed FF to display correctly. Please see above.

The problem appears to be related to "full resolution." But, I don't know why, as Fusion's defaults are to use full resolution, and the windows only work with the above settings -- which seems contradictory.

I hope this helps!

At least I have a working version of FF in my VM -- although the resolution renders it as HUGE... almost as though 1024x768 (not sure how to check).

Thanks everyone for their patience.


The priority flag is not set for this bug.
:jfkthame, could you have a look please?

For more information, please visit auto_nag documentation.

Flags: needinfo?(jfkthame)

I don't think this is a Layout issue; it more likely belongs in Widget:Cocoa, as it's related to the integration with the host OS resolution etc.

Could you try going to about:config and locating the layout.css.devPixelsPerPx setting, and change it from the default (-1.0) to 1.0? Does this change the size at which Firefox gets displayed? If you then go back to the default VM display settings, how does it display?

Component: Layout → Widget: Cocoa
Flags: needinfo?(jfkthame) → needinfo?(mozilla-jrk)

Thanks for the report. This issue is being tracked in bug 1305656.

Closed: 3 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1305656
Flags: needinfo?(mozilla-jrk)
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