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Why is my iMac menu bar disappearing?

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My iMac menu bar disappears after clicking on Firefox browser. Can anyone help me with this?

One of the screenshots reflects the browser without the menu bar and a light blue strip in its place. Also, I am able to raise the browser over the blue strip. When the menu bar is active, the browser butts up against the bottom of the menu bar.

Safari nor Google Chrome have this issue, only Firefox.

Please help.

My iMac menu bar disappears after clicking on Firefox browser. Can anyone help me with this? One of the screenshots reflects the browser without the menu bar and a light blue strip in its place. Also, I am able to raise the browser over the blue strip. When the menu bar is active, the browser butts up against the bottom of the menu bar. Safari nor Google Chrome have this issue, only Firefox. Please help.

Chosen solution

Thanks, Cor-el,

I disabled "Grammarly for Firefox" and the issue was resolved; I installed Grammarly in the past few days.

Fortunately, I didn't have restart in SafeMode.

Thanks again!

Read this answer in context 0

Additional System Details

Installed Plug-ins

  • Adobe® Acrobat® Plug-in for Web Browsers, Version 15.020.20039
  • Plugin that detects installed Citrix Online products (visit www.citrixonline.com).
  • Garmin Communicator Plug-in Version 4.1.0.0
  • Version 5.41.0.0
  • Displays Java applet content, or a placeholder if Java is not installed.
  • Microsoft Office for Mac SharePoint Browser Plug-in
  • Shockwave Flash 24.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 12.1.3
  • 5.1.50901.0
  • Unity Web Player version 5.3.6f1. (c) 2016 Unity Technologies ApS. All rights reserved.
  • WebEx64 General Plugin Container Version 205
  • zoom.us launcher plugin version 1.0

Application

  • Firefox 50.1.0
  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:50.0) Gecko/20100101 Firefox/50.0
  • Support URL: https://support.mozilla.org/1/firefox/50.1.0/Darwin/en-US/

Extensions

  • 1Password 4.6.2 (onepassword4@agilebits.com)
  • Adblock Plus 2.8.2 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})
  • AdBlocker for Gmail™ 0.1.6 (jid1-dswFGkUjb2SIHv@jetpack)
  • Application Update Service Helper 1.0 (aushelper@mozilla.org)
  • Blur 7.0.2305 (donottrackplus@abine.com)
  • DarkenBackground 0.1.4.1 (jid1-BIB927AeE8IrXw@jetpack)
  • Enhancer for YouTube™ 2.0.17 (enhancerforyoutube@maximerf.addons.mozilla.org)
  • Gmail Checker 2.6.6 ({6BFD307A-C040-11DA-9749-FB1C850B47DF})
  • Grammarly for Firefox 8.698.584 (87677a2c52b84ad3a151a4a72f5bd3c4@jetpack)
  • LastPass 4.1.32a (support@lastpass.com)
  • Multi-process staged rollout 1.5 (e10srollout@mozilla.org)
  • Pocket 1.0.5 (firefox@getpocket.com)
  • uBlock Origin 1.10.4 (uBlock0@raymondhill.net)
  • Web Compat 1.0 (webcompat@mozilla.org)
  • Dimmer 1.3.1-signed.1-signed (dimmer@tejohnso.github.com) (Inactive)
  • Ghostery 7.1.1.5 (firefox@ghostery.com) (Inactive)
  • NoScript 2.9.5.2 ({73a6fe31-595d-460b-a920-fcc0f8843232}) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription:
  • adapterDeviceID: 0x0fea
  • adapterDrivers:
  • adapterRAM:
  • adapterVendorID: 0x10de
  • crashGuards: []
  • currentAudioBackend: audiounit
  • driverDate:
  • driverVersion:
  • featureLog: {u'fallbacks': [], u'features': [{u'status': u'available', u'description': u'Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'HW_COMPOSITING'}, {u'status': u'available', u'description': u'OpenGL Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'OPENGL_COMPOSITING'}]}
  • info: {u'TileHeight': 1024, u'TileWidth': 1024, u'AzureFallbackCanvasBackend': u'none', u'AzureCanvasAccelerated': 1, u'AzureCanvasBackend': u'skia', u'AzureContentBackend': u'skia'}
  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • supportsHardwareH264: Yes
  • webgl2Renderer: (no info)
  • webglRenderer: NVIDIA Corporation -- NVIDIA GeForce GT 755M OpenGL Engine
  • windowLayerManagerRemote: True
  • windowLayerManagerType: OpenGL

Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
cor-el
  • Top 10 Contributor
  • Moderator
17687 solutions 160003 answers

Make sure you do not run Firefox in Full Screen mode (Mac: Command+Shift+F).

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • Do NOT click the "Refresh Firefox" button on the Safe Mode start window

You can use one of these to set which toolbars to show.

  • "3-bar" menu button -> Customize -> Show/Hide Toolbars
  • View -> Toolbars
    You can tap the Alt key or press F10 to show the Menu Bar
  • Right-click empty toolbar area
Make sure you do not run Firefox in Full Screen mode (Mac: Command+Shift+F). *https://support.mozilla.org/kb/how-to-use-full-screen Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem. *Switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance *Do NOT click the "Refresh Firefox" button on the Safe Mode start window *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes You can use one of these to set which toolbars to show. *"3-bar" menu button -> Customize -> Show/Hide Toolbars *View -> Toolbars<br>You can tap the Alt key or press F10 to show the Menu Bar *Right-click empty toolbar area

Chosen Solution

Thanks, Cor-el,

I disabled "Grammarly for Firefox" and the issue was resolved; I installed Grammarly in the past few days.

Fortunately, I didn't have restart in SafeMode.

Thanks again!

Thanks, Cor-el, I disabled "Grammarly for Firefox" and the issue was resolved; I installed Grammarly in the past few days. Fortunately, I didn't have restart in SafeMode. Thanks again!

Modified by boydmbd