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The magnification of my Mozilla browser will suddenly change from 100% to 120% to 90%, etc. on it's own; why?

Posted

I'll just be scrolling through a page and suddenly text will get big or small. The menu selection is not open.

I'll just be scrolling through a page and suddenly text will get big or small. The menu selection is not open.

Additional System Details

Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape 15.9.20069
  • CANON iMAGE GATEWAY Album Plugin Utility Module for IJ
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 11.60.2 for Mozilla browsers
  • The plugin allows you to have a better experience with Microsoft SharePoint
  • The plugin allows you to have a better experience with Microsoft Lync
  • Shockwave Flash 19.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 11.6.5.635
  • NPWLPG

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0

More Information

cor-el
  • Top 10 Contributor
  • Moderator
17571 solutions 158915 answers

You may have zoomed web page(s) by accident by holding the Ctrl key while rotating the mouse wheel. Reset the page zoom on pages that cause problems.

  • View > Zoom > Reset (Ctrl/Command+0 (zero))
You may have zoomed web page(s) by accident by holding the Ctrl key while rotating the mouse wheel. Reset the page zoom on pages that cause problems. *<b>View > Zoom > Reset</b> (Ctrl/Command+0 (zero)) *http://kb.mozillazine.org/Zoom_text_of_web_pages