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'Forms and Autofill' missing from 'Options'. But Firefox is autofilling credit card details.

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Firefox 85 is auto filling info into webforms - including Credit Card details. I would like to modify this. But when I select Options>Privicy & Security> and look between 'Logins & Passwords' and 'History' I find that 'Forms & Autofill' is missing. I am using Widows 10 20H2 and UK English. Can anyone suggest how to get access to Autofill?

Firefox 85 is auto filling info into webforms - including Credit Card details. I would like to modify this. But when I select Options>Privicy & Security> and look between 'Logins & Passwords' and 'History' I find that 'Forms & Autofill' is missing. I am using Widows 10 20H2 and UK English. Can anyone suggest how to get access to Autofill?

Alle svar (8)

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You can set this String pref on the about:config page to see if that makes this section appear.

  • extensions.formautofill.available = "on"

You can open the about:config page via the location/address bar. You can click the button to "Accept the Risk and Continue".

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extensions.formautofill.available is set to 'detect'. Is this significant. What does that mean and should it be 'On'?

Other settings are: extensions.formautofill.creditCards.available true extensions.formautofill.creditCards.enabled true extensions.formautofill.creditCards.hideui false

If also includes: extensions.formautofill.supportedCountries US but I am not in the USA.

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Yes, you need to change extensions.formautofill.available = "detect" to extensions.formautofill.available = "on" (case sensitive, no quotes).

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Yes that worked and I can now see 'Forms and Auto fill'. But when I look at 'Saved Credit Cards' or 'Saved Addresses' they are empty. Will they populate when I re-use them in the future? Its strange because Firefox is clearly saving them somewhere!

{I am amazed at how many paramenters there are. It does suggest Firefox is significantly over-engineered (compared to Chrome, Edge or Safari).}

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Note that auto-fill form data also can be saved as part of 'legacy' saved form data as set via Options/Preferences (search and form history).

  • Options/Preferences -> Privacy & Security -> Firefox will: "Use custom settings for history"
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Yes I have 'Use custom settings for history' set for 'Remember Form History'. Do you think this will save data in a different place than 'Forms and AutoFill' would use? In other words do you think the former is a 'legacy' system?

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Yes, the former is the legacy version and stores its data in formhistory.sqlite. Forms and AutoFill stores its data in autofill-profiles.json

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Thank you coe-el for your amazing expertise in this area.

I now wonder if I should have both versions switched on at the same time. - Will there be conflict between them? Or will the new override the legacy system? - Now that I understand whats going on, do you think I should switch off 'Forms and Autofill' and wait for Moxilla to roll it out to counties outside the USA?