Here's the nice css file for modifying text in tabs:

https://github.com/Aris-t2/CustomCSSforFx/blob/master/classic/config/custom_tab_text_settings.css

Howto

Thank you. This definitely fixed the bold part, but can you tell me how to increase the font size? And maybe how to make the active tab a different color? :)

You can add font-size: 16px !important; rules to the various .tab-label blocks.

How do I do that? Would it be a separate command for each tab type?

for example, under "busy" tab /*font size*//* .tabbrowser-tab[busy] .tab-label {

 font-size: 16px !important;

}

I assume this would also have to be added to selected and default types as well as busy/loading?

I'm not really familiar with css, since it's been about 20 years since I did any coding, and then mostly in C and assembly language. Is there somewhere I can take a crash course in styles?

Note that if there is a trailing "/*" on a line to start a comment like in "/*font size*//*" then the next part will be within this comment until the next closing "*/" comment tag.

I would personally prefer top modify the code and place all various ".tabbrowser-tab[busy] .tab-label {}" rules under one section and possibly add the comment after each rule referring to your other thread that shows a lot of rules, some enabled and some disabled (within comment tags /* <comment> */).

I.e. combine all .tabbrowser-tab[busy] rules. The leading "/*" disables the rule until the closing "*/" at the end of the line. Add an opening "/*" to disable the rule and remove the leading "/*" to enable this rule (only font-size is enabled in this CSS code).

/* busy/loading tab ************************/
.tabbrowser-tab[busy] .tab-label {
 /* color: #9933CC !important; /* text color */
 /* text-shadow: 0px 1px 0px #FFCCFF, 0px 1px 4px #FFCCFF !important; /* text shadow */
 /* font-weight: initial !important; /* bold */
 /* font-style: italic !important; /* italic */
 font-size: 16px !important; /* font size */
} 

Whoops! I didn't see the opening comment /* without a close. I've gone through the css file, tweaked it, and I now have what I need. Thank you for your help.