My Norton toolbar disappeared, when I backed up my firefox to 37.0.2

Firefox 38... was using waaaay too many CPU's and internet GB per month (I'm on a limited allotment), so I installed Firefox 37.0.2 back when I had no problems with all of that.

My Norton toolbar disappeared. I tried everything: restarting my computer, running live update, disabling and enabling the Norton toolbar in Firefox. It shows as enabled, but it is gone.

1aNorton.toolbar.JPG

1aNorton.toolbar2.JPG

How do I get it back on my browser?????

from: https://community.norton.com/en/forums/i-re-installed-firefox-3702-now-my-norton-toolbar-gone- No response.