Annoying bar on the right side of my browser, makes the text and resolution of things inside the browser look blurry, is there any way to fix this?

Question

There's been this white, or transparent bar on the right side of the browser (picture for reference: http://imgur.com/Jhzn9ym )
That annoying bar makes the whole browser become blurry in resolution and it even affects how I click on links, for example lets say I click on link, the browser will think im just highlighting text and make me click about half an inch to the right in order to click the link I want. I guess the transparent bar throws off the browser as if that bar isn't there but yet the browser has adjusted to fit the faulty resolution. I know about computers and I'm not a stay at home mom that has no idea how to fix things, if you notice the image the browser is fully opened, as in the button that has the square to make the browser fit the window is clicked, so the browser is set to fit. This is really annoying because it just throws off the way I use it and the functionality is not there any more.

Answer 1

If the Firefox window isn't maximized can you then drag te windows borders to make it fill the full screen width?
Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
*Download the full Firefox installer and save the file to the desktop<br>https://www.mozilla.org/en-US/firefox/all.html
If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.
*Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.
If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall