Why am I getting vertical lines below each letter I type?
I keep getting vertical lines below each letter that I type when filling in things with Firefox 4. There is one line created for each letter.
I keep getting vertical lines below each letter that I type when filling in things with Firefox 4. There is one line created for each letter.
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
- Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
In Firefox 4 Safe mode disables extensions and disables hardware acceleration.
- Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
If disabling hardware acceleration works then check if there is an update available for your graphics display driver.
In Firefox 4 you can use one of these to start in Safe mode:
- Help > Restart with Add-ons Disabled
- Hold down the Shift key while double clicking the Firefox desktop shortcut (Windows)