How do you know it's not working? Do you see an error? Do you not see a blue bar on any tab with Facebook in it?

The blue bar isn't there, and after I browse away from Facebook, up pop some ads that would indicate Facebook has been following me.

It could be your Cisco Webex Extension 1.1.0 interfering. Try disable that and check.

You aren't using permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History)?

Pkshadow said

It could be your Cisco Webex Extension 1.1.0 interfering. Try disable that and check.

I disabled it. No change.

cor-el said

You aren't using permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History)?

I do always use Private Browsing mode, and my setting for a long time has been Never Remember History. Thanks, though.

Bobandweave said

Pkshadow said

It could be your Cisco Webex Extension 1.1.0 interfering. Try disable that and check.

I disabled it. No change.

Hold on. It does appear to be working now. Thank you!

cor-el said

You aren't using permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History)?

It's working now. Thanks!

Tyler Downer said

How do you know it's not working? Do you see an error? Do you not see a blue bar on any tab with Facebook in it?

I now see a blue line on the tab, so we're good. Maybe the suggestion to disable Cisco WebEx may have done it.

Containers do not work in Private Browsing mode, so it is a choice between the two features.

• https://support.mozilla.org/en-US/kb/containers#firefox:linux:fx61

Note that Containers is disabled in Private Browsing and when Never Remember History is selected in your privacy preferences.