Hi everyone,
I'm from France and I come here because I have a very strange issue since a few days.
With Firefox, when I scroll, I see these strange grey bars :
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When I go lower to quit the screen zone when to problem appears and I come back to it, everything is back to normal.. Sometime, it's even parts of the page (pieces of pictures and texts) which are retain on the screen.. I sroll down and I scroll up again, and nothing is left, everything is normal.
I observe this phenomenon only with Firefox and Twitter. Everything seems to be okay with other browsers (Chrome, Opera, Safari..).
I try to deactivate all the addons, to re-initialise Firefox.. same problem.
I don't think it's an hardware issue, isn't it ?
Configuration :
OS X 10.10.4
iMac 27" late 2013 (bought december 2014)
CPU : 3.5 GHz Intel Core i7
RAM : 32 Go 1600 MHz DDR3
GPU : Nvidia GeForce GTX 780M 4096 Mo
Firefox 39.0
All the updates are done via App Store.
Any ideas of the nature of the problem ?
Thanks for your help.
Regards.
I'm from France and I come here because I have a very strange issue since a few days.
With Firefox, when I scroll, I see these strange grey bars :

When I go lower to quit the screen zone when to problem appears and I come back to it, everything is back to normal.. Sometime, it's even parts of the page (pieces of pictures and texts) which are retain on the screen.. I sroll down and I scroll up again, and nothing is left, everything is normal.
I observe this phenomenon only with Firefox and Twitter. Everything seems to be okay with other browsers (Chrome, Opera, Safari..).
I try to deactivate all the addons, to re-initialise Firefox.. same problem.
I don't think it's an hardware issue, isn't it ?
Configuration :
OS X 10.10.4
iMac 27" late 2013 (bought december 2014)
CPU : 3.5 GHz Intel Core i7
RAM : 32 Go 1600 MHz DDR3
GPU : Nvidia GeForce GTX 780M 4096 Mo
Firefox 39.0
All the updates are done via App Store.
Any ideas of the nature of the problem ?
Thanks for your help.
Regards.