Hi

This support article should help:

https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history#w_can-i-set-firefox-to-always-use-private-browsing

This didn't work or doesn't apply to the most recent update. The option is not there.

Hello

It works.

A trick to find out if you're in private browsing mode Type about:cache in the address bar Click on List Cache Entries, you'll find information privateBrowsingId

Hello

Other indicator to see if you use privatebrowsing.

1 - Go to Configuration Editor for Firefox https://support.mozilla.org/en-US/kb/about-config-editor-firefox 2 - Enter a search term browser.privatebrowsing.resetPBM.enabled value false (by defaut) you can try true.

How to set the home page. https://support.mozilla.org/en-US/kb/how-to-set-the-home-page

To complement, this discussion.

https://support.mozilla.org/en-US/questions/1098832