Hi Alrami, that seems suspicious. Q: If you search from Firefox's main address bar, do you get any results or does that close the tab, too? Q: If you temporarily change your default search engine to DuckDuckGo, does that work? You can do that on the Options page: [[Change your default search settings in Firefox]]. ---- One possible culprit would be an extension. You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either: * Ctrl+Shift+a (Mac: Command+Shift+a) * "3-bar" menu button (or Tools menu) > Add-ons * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. Then cast a critical eye over the list on the right side. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). Any improvement?

The way with DuckDuckGo worked, now the tabs are not closed.