Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Why do seeming random pixels appear across bottom of WEB page when scrolling to top of page?

  • 3 replies
  • 2 have this problem
  • 13 views
  • Last reply by cor-el

ComputerNerd
ComputerNerd
more options

Intermittently whenever I scroll toward top of a page a somewhat random pattern of pixels appear across the bottom of the page. This happens either when clicking on the right edge scroll bar or when the mouse cursor is on the page and I use the mouse scroll wheel.

Intermittently whenever I scroll toward top of a page a somewhat random pattern of pixels appear across the bottom of the page. This happens either when clicking on the right edge scroll bar or when the mouse cursor is on the page and I use the mouse scroll wheel.

All Replies (3)

Gingerbread Man
Gingerbread Man
more options

Can you include a screenshot of the problem?

Is a newer driver available for your graphics card?

Does the problem go away if you do the following?

  1. Type about:config into the address bar and press Enter.
  2. Press the big button to bypass the warning.
  3. In the lower pane, right-click anywhere and choose New, then Boolean.
  4. Name the preference layout.paint_rects_separately and set its value to true.
  5. Restart Firefox. If the problem doesn't go away, right-click the preference you created earlier and choose Reset; it will disappear when Firefox is restarted next.
ComputerNerd
ComputerNerd Question owner
more options

I have a screen shot of the issue at hand and included with this reply. I don't think graphics drivers are an issue here because I'm not having any problems with scrolling other graphic displays. It is only happening in Firefox and Thunderbird e-mail client.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window.

Note that you seem to be missing a font for the Bengali script.