I'm using 5.0-beta.177+d8fed09 on Ubuntu 16.04 and I find, recently but I can't say exactly when, that there is a new hyperlinking behaviour from individual Zotero items that makes it difficult to use. Simply left-clicking, once, on an item jumps to the URL in the browser AND it opens the attached PDF. This can't be by design, so perhaps it's something about my setup. Is there a way to disable it in about:config?