Firefox Preview does not support tab queueing in the background. On the current FF Beta browser, if I tap on a link, it doesn't open the browser but instead I get a notification stating "Tab saved in Firefox Beta | OPEN NOW". My use case is this: I am reading an article that has several links. I am interested in these links but want to visit them later after I read the main article. So I tap on each link to queue them IN THE BACKGROUND in Firefox Beta and then after I am done reading the article, I open FF and read those links. With FF Preview, each time I tap a link, it OPENS FF preview and loads the link instead of queuing it in the background. I have attached a screenshot showing the behaviour with FF Beta.