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  1. #1


    Member Since
    May 27, 2014
    Posts
    2
    weird lines on 2 computers
    On my 09 Imac and my new Macbook pro I have constant horizontal lines that run down the screen when opening web pages on Firefox. Does anyone know what may cause this.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,989
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    That's certainly strange. Since it's happening on both machines and only with Firefox, have you tried removing Firefox, download it again, and re-installing it?

  3. #3

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,864
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Also does it do it with Safari? Google Chrome?

  4. #4


    Member Since
    May 27, 2014
    Posts
    2
    Weird Lines running down the screen
    These lines don't seem to be effecting how the pages work but they are little annoying. I haven't tried removing and reinstalling Firefox and haven't used Safari or Chrome.
    Jeff

  5. #5

    cradom's Avatar
    Member Since
    Feb 14, 2004
    Location
    Groves, Texas
    Posts
    4,474
    Specs:
    21in. iMac 10.11 --- HP win 10
    I get the same thing when I quit Firefox. A single horizontal line of numbers and letters, too fast to read, in the window.
    I just marked it up to a glitch in the latest version.
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

  6. #6

    lclev's Avatar
    Member Since
    Jul 24, 2013
    Location
    Ohio
    Posts
    2,451
    Specs:
    2011 MBPro, 2013 MBAir, 2010 MacPro, iPhone 6+
    Does it scroll from top to bottom and repeat or is it just one line that runs down and disappears?

    Lisa

  7. #7

    cradom's Avatar
    Member Since
    Feb 14, 2004
    Location
    Groves, Texas
    Posts
    4,474
    Specs:
    21in. iMac 10.11 --- HP win 10
    When I quit, I get a blank white window with 1 line of text/numbers about the top of the page for just a flash, and it's gone.
    Always listen to experts. They’ll tell you what can’t be done and why. Then do it!
    -Lazarus Long

  8. #8

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,989
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    I don't know what's going on with Mozilla lately, but I have just about given up on all their software. I have to continue using Thunderbird because of its newsreader capability and some NNTP sites that I go to, otherwise I would remove it too.

    To the OP: I suggest start using Safari or even Chrome. Safari is stable, and Apple continues to update it for security. Chrome is a bit faster than Safari but also somewhat finicky and it's still only 32 bit.

  9. #9

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,706
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    I have given up on Mozilla and back to Safari using Adblock and Ghostery.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

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