I updated to 56.0. The Firefox update page, https://www.mozilla.org/en-US/firefox/56.0/whatsnew/?oldversion=55.0.3, (see image I've attached or move down the page to opposite the words More responsive tab switching) shows the + sign to open a new tab to the right of the current tab. But I can't get my plus sign to move. I've right-clicked on the tab bar, chosen Optimize, but the + sign won't stay to the right of the current tab. I can get it to move to the far right, but the illustration above shows the + sign to the immediate right of the last tab. How can I get my + sign to do what Firefox shows that it can do? MikeJanus