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Why do I lose the scroll bar

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On secondary pages I lose the scroll bar. For example when I go into http://my.xfinity.com/?cid=customer the scroll bar is evident. However when I go int my email https://web.mail.comcast.net/zimbra/mail?app=mail#1 the scroll bar disappears. When I close the email page https://web.mail.comcast.net/zimbra/mail?app=mail#1 and go back yo the main http://my.xfinity.com/?cid=customer the scrollo bar returns. How can I get the sacroll ar to not go away on secondary pages

On secondary pages I lose the scroll bar. For example when I go into http://my.xfinity.com/?cid=customer the scroll bar is evident. However when I go int my email https://web.mail.comcast.net/zimbra/mail?app=mail#1 the scroll bar disappears. When I close the email page https://web.mail.comcast.net/zimbra/mail?app=mail#1 and go back yo the main http://my.xfinity.com/?cid=customer the scrollo bar returns. How can I get the sacroll ar to not go away on secondary pages

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You could be experiencing this bug that happens when you are running Firefox in Private Browsing mode and you open links in a new window.

  • bug 1166066 - Firefox 38 regression: link in private window with target="_blank" opens window with no tabs/toolbars/menus (bug1166066)

Possible workarounds:

  • (1) use Options/Preferences > General: "Open new windows in a new tab instead"
  • (2) Shift+click links to open in a new window with the standard features or use the right-click context menu.

You can modify dom.disable_window_open_feature prefs and change their value to true to prevent a website from disabling toolbars and scroll bars in a pop-up window

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.