I upgraded from 3.6 and could not get the orange Firefox button but only a grey one with misaligned commands. When I hit View/Menu Bar even this button has vanished and the screen resembles 3.6
I use Win7 on a desktop PC. I upgraded Firefox 3.6 to 4.0. Where there should have been the orange firefox button was a grey button 'Firefox' with a small arrow. on clicking this the commands were there, but not properly aligned. There was also no minimise/maximise/exit buttons on the top right of the screen. I checked 'Help' and found no info. I then turned on View/Menu Bar. The minimise/maximise/exit buttons appeared; the grey button vanished and the screen now resembles FF 3.6. However About tells me that I am using 4.0. BTW, I also tried various Beta versions in 2010 and abadnoned them because the same problem happened.
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The orange Firefox menu button will only appear if the menu bar is hidden.
Are you using a custom theme (Tools > Add-ons > Appearance/Themes) ?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
See:
Many thanks Cor-el. I had an incompatible theme, plus one or two other incompatible add-ons. I have disabled as suggested and everything seems to look fine.