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Need horizontal lines between message headers, disappeared with v115

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Hi, I've had this problem two other times with various upgrades, where my setting no longer works. I need horizontal lines between message headers in all folders. My eyes need the lines to be able to scan across and not get lost. I am using TB v115.3.3 on Windows 11 Home.

Here is an old version of my problem: https://support.mozilla.org/en-US/questions/1277758

Here is the full content of my userChrome.css file that is located here: C:\Users\Victoria\AppData\Roaming\Thunderbird\Profiles\hid4pw25.default\chrome

@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 for any help.

--Victoria

Hi, I've had this problem two other times with various upgrades, where my setting no longer works. I need horizontal lines between message headers in all folders. My eyes need the lines to be able to scan across and not get lost. I am using TB v115.3.3 on Windows 11 Home. Here is an old version of my problem: https://support.mozilla.org/en-US/questions/1277758 Here is the full content of my userChrome.css file that is located here: C:\Users\Victoria\AppData\Roaming\Thunderbird\Profiles\hid4pw25.default\chrome @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 for any help. --Victoria

All Replies (2)

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Chosen Solution

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Thank you @sfhowes!! I can understand that a lot of users find trying to work with this backend stuff to be difficult. I find it difficult, but I'm motivated. The first couple of times I had to ask multiple questions about where to find the information.

I found the following link to be helpful, even again today to find the location for the .css, even though the actual text for the .css file is incorrect: http://forums.mozillazine.org/viewtopic.php?p=12413885&sid=fbc7372697b6b523ede8af87f29e2002#p12413885

Last, I tried it with the blue color in, too bright and busy, but my color grey really still works for me. Thank you!