Create a new item in Orion Settings under "Browsing" called "History", similar to "Bookmarks" with a checkbox to enable or disable "Open URLs from History in new tab".
Currently, when you select a link from the History menu, Orion will load that page in the currently open/frontmost window/tab, replacing the previously loaded page. It would be nice to have an option in Orion settings, very similar to the Bookmarks option, so that selected links from the browsing history will always open in a new tab.
I know that you can press the CMD key when selecting links from the browsing history, which will not replace the current tab's contents, and open a new tab instead, but the CMD key functionality is usually reserved for opening new tabs in the background, i.e. not make the new tab the active tab.
So if the option to "Open URLs from History in new tab" is enabled in Orion settings, the new functionality would be that when you select a link from the browsing history, Orion will create a new tab, make it the active tab, and load the link you selected from the history. If the user presses the CMD key, when selecting a link from the History, Orion will create a new tab, but not make it the active tab, and load the selected page in that tab in the background.
Conversely, if the option to "Open URLs from History in new tab" is disabled in Orion settings, Orion would behave as it does now: (1) without CMD key will load the new URL in the currently active tab; (2) with CMD key will create a new tab, but not make it active, while loading the page in the background.