Open Links in New Tab is described as 'Modern Chrome Web Extension and Firefox Browser Addon for The Aviation Safety Network to enable dark mode plus add additional features' and is an app in the web browsers category. There are 2 alternatives to Open Links in New Tab for a variety of platforms, including Mac, Windows, Linux, Mozilla Firefox and Waterfox apps. The best Open Links in New Tab alternative is Tab Utilities, which is both free and Open Source.
Open Bookmarks/History/Homepage/URL/Search in new tabs, and more utilities for tabbed browsing, including open tab next, focus related/last visited tab, protect/lock/faviconize/pin tab, multiple tab handler, tab clicking options, etc.
Always open new tabs to the right of the current one(which is not the same as setting browser.tabs.insertRelatedAfterCurrent to true). You can however get the default behaviour by:
Germany
EU