Repeating webpage content while scrolling, tab content overlay
Sometimes webpage content is repeating while scrolling up and down (like background-repeat) and some webpage content from inactive tab іs superposed (overlayed) with active tab content when you switch between tabs. After that firefox stops answering (white foreground) in most cases and I must close firefox. When session is restored these problems disappear. Hardware acceleration is off, firefox and extensions are up to date, no viruses found. OS - Windows 7 Ultimate 64 bit. I have only these extensions active: Autocopy 2, AutocopySelection2Clipboard, Autofill. Autofill Forms, AutoFormer, Firebug, I'm not robot captcha clicker, Self-destructing cookies, Simple Form Fill and Tile tabs (mostly off). Videocard drivers were updated this year.
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Automatic scroll and smooth scroll are off.
All plugins are off
This problem appeared for the first time in may or june 2017 after firefox update.
You can try to disable hardware acceleration in Firefox.
- Options/Preferences -> Advanced -> General -> Browsing: "Use hardware acceleration when available"
You need to close and restart Firefox after toggling this setting.
You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.