If you click the email address in the "3-bar" Firefox menu button drop-down list then you should find a "Sync Now" menu item.

Have you seen these pages? https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer https://support.mozilla.org/en-US/kb/how-do-i-choose-what-information-sync-firefox

The screenshot showing what I have set on my mac and it's the same on all of my other devices. To get an better idea just download a different version of Firefox to the same computer. Sync will see the different version as another device. Go into settings and then you will see sync and the options.

Thanks for your help. For future reference - In case anyone in the future makes the same silly mistake - hope it's OK to explain.

After going through all the same steps on both computers a half dozen times on both computers, all the settings seemed fine, and when I hit the Sync Now - the little Sync "wheel" spun for a second. Going back and forth a couple times - each would tell me it "Synced x mins ago" I just knew I had to be missing something, since my Bookmarks etc were already synced from when I first set up the newer laptop 6 mos ago.

But... Silly me... I was expecting to see Tabs from one actually open in a Window on the other... until I finally noticed the LIST of Tabs, below the Sync drop-down box. Experimented again, opening a new Tab on one computer... and sure enough it was added to that List on the other.

Thanks again! Your help did confirm I wasn't missing anything in the steps - which forced me to keep looking for the one thing I was misunderstanding!

Note that you can also inspect the Synced Tabs in the sidebar.

• https://support.mozilla.org/en-US/kb/use-firefox-sidebar-access-bookmarks-history-synced

Thanks! I'm old-school former geek wanna-be & tend to get stuck in my ways - still have my '03 desktop tower - Win XP "loaded" w/ 3/1/2, Zip, DVD RAM and Firefox/Thunderbird but also Netscape & emails going waay back. Been doing a lot of genealogy & military research & getting ready to travel - so want everything accessible on my "little" laptop & 2TB SS ext USB drive... seriously avoiding the Cloud!

Anyway - it was very helpful to review some of the other tools I'd forgotten about & could keep handier! Thanks again!