Toolkit:Password Manager/Debugging: Difference between revisions

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Toolkit:Password Manager/Debugging (view source)

Revision as of 20:24, 15 October 2020

1,750 bytes added , 15 October 2020

Add a new reason for why logins are not autofilled. See https://bugzilla.mozilla.org/show_bug.cgi?id=786276 for more details.

Bdanforth

3

edits

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 The password manager in Firefox includes the ability to log debugging information to the [https://developer.mozilla.org/en-US/docs/Tools/Browser_Console Browser Console], which can be enabled to help diagnose problems. This logging is off by default. Passwords are not shown in the output.
-= Enable Debug Logging =
+= Gathering Debug Logs =
+[https://drive.google.com/file/d/1P94qZvQc3FkLiwhrmEYTSweCGt09ef97/preview Follow the instructions in this video] or the written steps in both sections below.
+== Enable Debug Logging ==
-# Enter "about:config" in the URL bar.
+<ol>
-# You may see a warning screen, cautioning you about changing advanced preferences. Click the button to ignore the warning.
+   <li>Enter "about:config" in the URL bar.</li>
-# Find the <code>signon.debug</code> setting, and set them to <code>true</code> (the latter may already be <code>true</code>). You can enter the name in the "Filter" box at the top of the page to help find them. To change the value of a setting, right-click on the line and select "Toggle" or just double-click the line.
+   <li>You may see a warning screen cautioning you about changing advanced preferences. Click the button to ignore the warning.</li>
+   <li>
+      Make sure '''''all''''' of the following prefs are set to 'true'.  (Find a pref by entering its name in the "Filter" box at the top of the page.  Toggle its value by either clicking the ⇌ (Toggle) icon or double-clicking the line.)
+      <blockquote>signon.debug<br/>devtools.browserconsole.contentMessages<br/>devtools.browserconsole.filter.error<br/>devtools.browserconsole.filter.warn<br/>devtools.browserconsole.filter.info<br/>devtools.browserconsole.filter.log<br/>devtools.browserconsole.filter.debug<br/></blockquote>
+   </li>
+   <li>Restart Firefox</li>
+</ol>
-= View the Logging =
+== View the Logging ==
-# To view the logging, open the [https://developer.mozilla.org/en-US/docs/Tools/Browser_Console Browser Console] and/or Browser Content Toolbox (for logs related to in-page stuff) from the Tools → Web Developer menu. If you don't see these, follow the instructions on the MDN page to enable it.
+# To view the logging, open the [https://developer.mozilla.org/en-US/docs/Tools/Browser_Console '''Browser''' Console] and/or Browser Content Toolbox (for logs related to in-page stuff) from the Tools → Web Developer menu. If you don't see these, follow the instructions on the MDN page to enable it.
-# Make sure the log level toggles ("Errors", "Warnings", "Logs", …, "Debug") are all enabled (blue) in the Browser Console. "CSS" should ideally be disabled.
+#* '''Note that the above consoles are different than the Web Console that you use for regular web development.'''
+# Make sure the log level toggles ("Errors", "Warnings", "Logs", …, "Debug") are all enabled in the Browser Console. "CSS" should ideally be disabled.
 # Load the problematic web (or about:logins) page in in the browser. You should see messages in the Browser Console like:
   LoginManagerContent: onDOMFormHasPassword for <nowiki>https://www.google.com</nowiki>
@@ Line 27: / Line 36: @@
 * If there are multiple username+password combinations saved for a domain and the username field wasn't pre-filled by the website, Firefox won't know which username/password to use and thus won't auto-fill. Use the autocomplete dropdown to choose the username you would like to use.
 * If the page pre-fills a username field (e.g. using your session/local cookies or with a value attribute used as an old hack for placeholder text), Firefox won't fill in a password if the username field value doesn't match the one saved.
+* The <code><form></code>'s <code>action</code> attribute is for a different origin than the <code>action</code> origin that the login was saved for.
+* The field is <code>disabled</code> or <code>readonly</code>
+* The username or password doesn't fit within the <code>maxlength</code>
+* The password field for the form has the <code>autocomplete</code> attribute with a value of <code>"new-password"</code>
+* There are more than 5 password fields in the "form".
+* The login form is loaded into a subframe (e.g. an <code><iframe></code>), and it is cross-origin (i.e. not [https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy same-origin]) with the top level frame.
 == HTTP Authentication popup not filled in ==
@@ Line 37: / Line 52: @@
   LoginManagerPrompter: Login unchanged, no further action needed.
   …
+== Won't prompt to save a password ==
+Potential reasons for not getting a prompt to save:
+* The password is already saved. Check about:logins to see if it's already there
+* Make sure "Ask to save logins and passwords for websites." is check in about:preferences#privacy-logins
+* Make sure the website isn't in the "Exceptions…" list of about:preferences#privacy-logins
+* If you are in a private window, the prompt may be dismissed by default and not pop up automatically.