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Why won't it let me close a tab?

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I currently have 4 tabs up. I've tried keyboard controls, clicking the x on right had corner of the one I want to close, and right clicking the tab and choosing the close tab option. The only way I can close tabs is to exit firefox which is counterproductive if there's one tab I need to keep open. I've gone through the tools & options as well as your trouble shooting info, but no answer.

I currently have 4 tabs up. I've tried keyboard controls, clicking the x on right had corner of the one I want to close, and right clicking the tab and choosing the close tab option. The only way I can close tabs is to exit firefox which is counterproductive if there's one tab I need to keep open. I've gone through the tools & options as well as your trouble shooting info, but no answer.

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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).


Set the browser.tabs.closeWindowWithLastTab pref to false on the about:config page to prevent closing the last tab from closing that window and make a close button appear if only one tab is open.