Firefox: How many tabs are open?

Vie tabs open? With a simple trick you can find out how many tabs are currently open in Firefox.

Sometimes you’re just curious and want to know: How many tabs are currently open in Firefox?

The easiest way to do this is as follows: Go over in Firefox HamburgerMenu at the top right to the Settings. Activate Restore previous session, in order to Warn when exiting the browser can be activated. Now hook it Warn when exiting the browser also on. If you don’t want Firefox to restore the session the next time you open it, you can Restore previous session now switch off again. We tried it: The warning function when exiting the browser remains active.

Now try it out: Click in the upper right corner Hamburger-Menu and select at the very bottom break up; alternatively, you can also Ctrl+Shift+Q (Ctrl+Shift+Q) to press. Voilà, Firefox tells you how many tabs in how many windows are now being closed. You already know. Since you didn’t want to close the browser at all, just wanted to find out the number of tabs and windows, click on Abortso that Firefox doesn’t actually close.

With activated «Warn when exiting the browser» Firefox shows the number of tabs and windows when exiting via Menu / Exit


Also test it: In another tip we at Stackoverflow discovered, it was said that the following will also work. Open via the address bar about:telemetry and click in the left column Scalars. Use the search field in the top right to filter for the keyword browser. Among other things, the following two entries remain, which should show the number of open or maximum open tabs in the current session:
  • browser.engagement.tab_open_event_count
  • browser.engagement.max_concurrent_tab_count

However, a quick test has shown that these numbers are often incorrect. However, the number in the closing dialog was exactly right in our experiments.

There are also add-ons for Firefox for displaying the number of open tabs, but why install an extension if it works with standard tools?

Source: com! professional by

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