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Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Firefox automatically opens new tab, even when I don't want it to. Need to stop this.

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In Blackboard I need Firefox to not open a new tab. Before the last update it was fine, but now when I click on a new choice (i.e. the grade book) it always opens a new tab. My Bb administrator says it is a browser issue. I can right click to open a new tab, but there is no choice not to open a new tab.

Réiteach roghnaithe

You can check some prefs on the about:config page:

For links opened via JavaScript you can look at this pref:

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.


Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window
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What is in that new tab? Ads?

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.


Adblock Plus {web link} Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Adblock Plus Pop-up Addon {web link} Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.

Forum; Adblock Plus Homepage {web link}

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Réiteach Roghnaithe

You can check some prefs on the about:config page:

For links opened via JavaScript you can look at this pref:

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.


Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window