Firefox 115 Will Let You Open Links or Search with Middle-Click on New Tab Button
This new feature will enable middle-click paste of your clipboard’s contents, whether it’s an URL or plain text, on the New Tab button. So middle-clicking on the New Tab button will open whatever is in your clipboard, no matter from where the content (URL or text) was copied (that means it can be from any of your apps).
As you can imagine, this will save you some time as you won’t have to first open a new tab and then paste the URL or text you copied on your clipboard. The copied text will be opened with your default search provider, as expected.