Firefox - how to refresh an open tab automatically every x minutes?

Solution 1:

From allow-pages-autorefresh-reload-firefox For quick reference-

Firefox Advanced Options

You can enable the auto-refresh from Firefox Advanced Options by clicking the orange Firefox button on the top left corner of the browser and then clicking "Options." From the list of options, select "Advanced." Under the "General" tab, in the "Accessibility" section, you will be able to remove the check mark next to "Warn me when websites try to redirect or reload the page" to allow the auto-refresh or reload feature.

Firefox About Config

You can also configure Firefox manually by entering "about:config" in the browser's address bar. A warning message will appear; click on "I'll be careful, I promise!" to be able to continue. Next, type "Accessibility.blockautorefresh" in the search box at the top of the page. Double-click the "true" value next to this preference to set it to "false" and allow the browser pages to auto-refresh.

Solution 2:

You can find different Extention on Firefox Browser Add-on for auto-refresh tab

Get as per your requirement

check this two Extention for auto-refresh:

Tab Auto Refresh

Tab Reloader