in thunderbird user profile folder in "chrome/userContent.css" I have this:

/ quote colors for message display / blockquote[type=cite] { color: PowderBlue ! important; } blockquote[type=cite] blockquote { color: LightBlue ! important; } blockquote[type=cite] blockquote blockquote { color: SkyBlue ! important; } blockquote[type=cite] blockquote blockquote blockquote { color: LightSkyBlue ! important; } blockquote[type=cite] blockquote blockquote blockquote blockquote { color: DeepSkyBlue ! important; }

/ quote color for message composing / span[_moz_quote=true] { color: PowderBlue ! important; }

security.tls.version.min specifies the minimum required protocol version (thus, the lowest version allowed to fall back to when higher versions are not available).
security.tls.version.max specifies the maximum supported protocol version (thus, the highest version to initiate a connection with before falling back to lower versions).

0
SSL 3.0 is the minimum required / maximum supported encryption protocol. (Default up to FF/TB 33.0 and SM 2.30 for minimum version.)

1
TLS 1.0 is the minimum required / maximum supported encryption protocol. (This is the current default for the minimum required version.)

2
TLS 1.1 is the minimum required / maximum supported encryption protocol.

3
TLS 1.2 is the minimum required / maximum supported encryption protocol. (This is the current default for the maximum supported version.)