Linux: set browser.tabs.searchclipboardfor.middleclick to false
similar to #10089 (closed)
FF115+ 1418462 Middle clicking on new tab should search or open what's in the selection clipboard on linux
/* 2612: disable middle click on new tab button opening URLs or searches using clipboard [FF115+] [LINUX] * When true, middle clicks on the new tab button will open the xclipboard contents in a new tab. If the * xclipboard content is an URL, that URL is opened, and any other text is opened with your default search provider. */ user_pref("browser.tabs.searchclipboardfor.middleclick", false); // [DEFAULT: true Linux]
Someone said can you accidentally click a new tab button ...
The new tab button is specifically designed to be CLICKED .. it's a click magnet ... with multiple results - e.g. right click = containers menu, left click = newtab, and now middle-click (on linux). So it's VERY likely to be magnitudes of order greater as an accidental wrong click-type vs say, some page content. So to answer your question ... YES :)
Do we wish to do anything about this. Note, keyword.enabled = true, so this will leak to search engines. And URLs will go to URLs.