STR: 1) Enable credit card autofill by setting "extensions.formautofill.available" to true. 2) Restart browser so pref can take effect 3) Add credit card to "about:preferences" -> Saved Credit Cards. I just use a number off [paypal's test list](https://www.paypalobjects.com/en_GB/vhelp/paypalmanager_help/credit_card_numbers.htm) 4) Navigate to one of the [form fill test pages](https://mozilla.github.io/form-fill-examples/basic_cc.html) 5) Open browser toolbox and set a breakpoint in FormAutofillHandler at line 210, or the first line under "matchSelectOptions". [Permalink for reference](https://searchfox.org/mozilla-central/rev/196daa17009ea2aaad62458edf033201d2750d98/toolkit/components/formautofill/FormAutofillHandler.jsm#209). 6) Click a field on the test page and notice the breakpoint is triggered 7) Remove breakpoint 8) Click a field on the test page and notice the breakpoint is still triggered Expected results: Breakpoint is not triggered after removal Actual results: Breakpoint is triggered after removal. You must restart the browser toolbox in order to remove the reference to the breakpoint. I have no idea why this is happening, and I verified this doesn't happen in the password manager code (which is the other part of the codebase that I'm familiar with). I'm guessing this is something to do with how the form autofill component is structured but I'm not sure.
Bug 1730968 Comment 0 Edit History
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STR: 1) Enable credit card autofill by setting "extensions.formautofill.available" to true. Edit: you probably want to update "extensions.formautofill.creditCards.supported" to "on" instead of the previous pref. 2) Restart browser so pref can take effect 3) Add credit card to "about:preferences" -> Saved Credit Cards. I just use a number off [paypal's test list](https://www.paypalobjects.com/en_GB/vhelp/paypalmanager_help/credit_card_numbers.htm) 4) Navigate to one of the [form fill test pages](https://mozilla.github.io/form-fill-examples/basic_cc.html) 5) Open browser toolbox and set a breakpoint in FormAutofillHandler at line 210, or the first line under "matchSelectOptions". [Permalink for reference](https://searchfox.org/mozilla-central/rev/196daa17009ea2aaad62458edf033201d2750d98/toolkit/components/formautofill/FormAutofillHandler.jsm#209). 6) Click a field on the test page and notice the breakpoint is triggered 7) Remove breakpoint 8) Click a field on the test page and notice the breakpoint is still triggered Expected results: Breakpoint is not triggered after removal Actual results: Breakpoint is triggered after removal. You must restart the browser toolbox in order to remove the reference to the breakpoint. I have no idea why this is happening, and I verified this doesn't happen in the password manager code (which is the other part of the codebase that I'm familiar with). I'm guessing this is something to do with how the form autofill component is structured but I'm not sure.