In the updated sidebar, the browsing history and "Tabs from other devices" entries no longer support opening links in a new tab by simply clicking the middle mouse button (which should function like Ctrl + left-click). This was possible in the previous version of the browsing history. However, bookmarks in the new sidebar still allow opening links in a new tab using the middle mouse button.
Additionally, there doesn’t seem to be a shortcut key for opening links in a split tab (side-by-side view). Currently, I have to drag and drop, which feels cumbersome. I suggest adding this feature to the right-click context menu, introducing a keyboard shortcut (e.g., Ctrl + left-click, or another modifier key), or an option to set allowing the middle mouse button to open links in a split tab. Alternatively, a double-right-click could also work.
If this feedback cannot be directly forwarded to the developers, where should I post or submit these suggestions? I've asked in https://support.mozilla.org, someone replied and suggested me to post at feedback(that link directed me to these Mozilla Connect page.)/bugzilla.
