This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Want horizontal lines between message headers

more options

Once again following a Thunderbird update, the lines between my message headers have disappeared. Here is the previous question and solution I found: https://support.mozilla.org/en-US/questions/1256823

However, now, I still have the file userChrome.css set up the same way in my profile folder: C:\users\myname\appdata\roaming\thunderbird\profiles\jr8ewpri.default\chrome, but Thunderbird is not utilizing it. How do I get TB to recognize that file again?

Here is the content of the userChrome.css file:

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

/* Add bottom border to thread pane (message list) */

  1. threadTree treechildren:-moz-tree-row {
 border-bottom: 1px solid grey !important;

}

Thank you, --Victoria

Once again following a Thunderbird update, the lines between my message headers have disappeared. Here is the previous question and solution I found: https://support.mozilla.org/en-US/questions/1256823 However, now, I still have the file userChrome.css set up the same way in my profile folder: C:\users\myname\appdata\roaming\thunderbird\profiles\jr8ewpri.default\chrome, but Thunderbird is not utilizing it. How do I get TB to recognize that file again? Here is the content of the userChrome.css file: @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); /* Add bottom border to thread pane (message list) */ #threadTree treechildren:-moz-tree-row { border-bottom: 1px solid grey !important; } Thank you, --Victoria

Modified by Victoria-nola

Chosen solution

There's an extra : needed after treechildren for this to work in TB 68 (see picture).

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

/* Add bottom border to thread pane (message list) */
#threadTree treechildren::-moz-tree-row {
  border-bottom: 1px solid threedlightshadow !important;
}
Read this answer in context 👍 1

All Replies (2)

more options

Seçilmiş Həll

There's an extra : needed after treechildren for this to work in TB 68 (see picture).

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

/* Add bottom border to thread pane (message list) */
#threadTree treechildren::-moz-tree-row {
  border-bottom: 1px solid threedlightshadow !important;
}
more options

It worked! Thank you very much.

--Victoria