QuickBooks Online sometimes provides useful information in a form of a pop-up window. For this reason, the pop-up functionality of your Mozilla Firefox web browser is very important and will need to be enabled when using the program.
To enable pop-ups for Mozilla Firefox
Select the Menu button. Note: The menu button looks like 3 horizontal bars located at the top right corner of the browser.
Choose Options (for Mac users: Start from the Firefox menu then select Preferences). You can also press the F10 or ALT key to use the Tools menu.
Select the Content tab.
In the Pop-ups section, choose Exceptions.
Enter qbo.intuit.com then select Allow.
Enter qdc.qbo.intuit.com then select Allow.
Some toolbars have their own pop-up blockers and the menu options or icons may vary. What you can do is to hover your mouse over each icon, a text will then appear describing what the icon does. When you hover over the pop-up blocker icon, it will give you a list of pop-ups blocked or the current on/off status.
To see what toolbars you have and make them available, select the View menu then Toolbars.
If you do all of this and QuickBooks Online pop-ups are still blocked, press the CTRL key before selecting the button or link that brings up the pop-up window. This will suppress any pop-ups.