#1150435 thunderbird: Email and subject fields unreadable white text on white background

Package:
thunderbird
Source:
thunderbird
Description:
mail/news client with RSS, chat and integrated spam filter support
Submitter:
Frédéric MASSOT
Date:
2026-10-18 16:43:01 UTC
Severity:
normal
#1150435#5
Date:
2026-10-09 17:10:18 UTC
From:
To:
Dear Maintainer,

I use the MATE desktop environment with the BlackMATE theme and Thunderbird with
its native black theme.

Following the Thunderbird update from version 140.17.0esr-1 to 153.4.0esr-1,
the email address and subject fields in the new message composition window display
white text on a white background, making them unreadable.

I tried changing the text color in the Thunderbird settings, but the change does not apply to these fields.

Regards.
#1150435#10
Date:
2026-10-18 16:30:33 UTC
From:
To:
Hi,

To ensure the address and subject fields are visible, with black text on
a light background, I added these files to my Thunderbird profile:

~/.thunderbird/xxxx.default$ cat user.js
user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);

~/.thunderbird/xxxx.default$ cat chrome/userChrome.css
#msgcomposeWindow #recipientsContainer,
#msgcomposeWindow .address-container,
#msgcomposeWindow .address-row input,
#msgcomposeWindow .address-input,
#msgcomposeWindow #msgSubject,
#msgcomposeWindow #msgIdentity,
#msgcomposeWindow #msgIdentity input {
   background-color: #2b2a33 !important;
   color: #fbfbfe !important;
}
#msgcomposeWindow .address-container:focus-within,
#msgcomposeWindow #msgSubject:focus {
   background-color: #1c1b22 !important;
}



Regards.