Hello, try these add-ons:

https://addons.mozilla.org/en-US/firefox/addon/save-data/ https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/ https://addons.mozilla.org/en-US/firefox/addon/disable-autoplay/ https://addons.mozilla.org/en-US/firefox/addon/noflash/

Did this solve your problem? If it did mark as solution.

Many programs "phone home" to check for updates. Firefox not only checks for its own updates but also its add-ons.

You have to tell all those programs not to check for updates, but to remember to do manual checks now and then.

In checking my data usage, there are two (2) Firefox entries - firefox.exe 1.57 GB and firefox.exe 1.3 GB. Why are there two entries for data usage?

Please advise as I'm on a restricted data plan from AT&T

Thanks Sandy

I am not sure what you are seeing, but;

More than one process is normal for the current Firefox. http://www.ghacks.net/2016/07/22/multi-process-firefox/

Multi-process Firefox is codenamed "e10s". https://wiki.mozilla.org/Firefox/multiprocess

Try to disable multi-process tabs in Firefox. You can disable multi-process tabs in Firefox by setting the related prefs to false on the about:config page.

browser.tabs.remote.autostart = false browser.tabs.remote.autostart.2 = false

Type about:config<enter> in the address bar. If a warning screen comes up, press the I Accept the Risk button. At the top of the screen is a search bar.