We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can only open 4 tabs in window. Then + button doesn't work, and New Tab greyed-out in menu.

  • 1 balasan
  • 2 ada masalah ini
  • 4 paparan
  • Balasan terakhir oleh cor-el

more options

Running Firefox 7.0.1 on Mac OS X 10.7.1.

Number of tabs that can be opened in a single window is limited. Can't currently open more than four. Clicking the "+" button to the right of open tabs does nothing, and the "New Tab" option in the file menu is greyed out.

Running Firefox 7.0.1 on Mac OS X 10.7.1. Number of tabs that can be opened in a single window is limited. Can't currently open more than four. Clicking the "+" button to the right of open tabs does nothing, and the "New Tab" option in the file menu is greyed out.

All Replies (1)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).