Some projects keep surprising me with their “solutions,” and this is one of those cases. A proposal under review by developers from GNOME and Mozilla could change how middle-mouse-button paste behaves on Linux and other Unix-like systems.
The discussions, visible in Mozilla’s Phabricator revision D277804 and a linked GNOME gsettings-desktop-schemas merge request, focus on disabling the traditional primary selection paste by default.
Mozilla proposes changing the default behavior of the Firefox browser on Unix builds so that pressing the middle mouse button no longer pastes text by default. The author of the revision frames the current behavior as a source of confusion and accidental pastes, especially when users press the middle button without expecting the clipboard contents to be inserted into text fields.
You select the text and it magically is in this second (or actually first) clipboard. I have a habit of selecting the text I’m reading, so this selection is always something, and sometimes contains sensitive data. There were countless of situations when I was composing a long message, scrolling it and accidentally, not even noticing (it’s long already), pasted the contents. I hate this ‘feature’ and in general don’t understand who wants it and why. Disabling it would be a huge improvement for everyone, as those who need it usually know they need it, so there’s no difficulty in enabling it back.