Google refused to kick the can back when Mozilla spun off Mozilla Messaging as a self funding entity. The experiment failed, Mozilla messaging is no more, as is the development by Mozilla , they moved on years ago. Basically no one has changed the search engines since 2012.

I did file a bug requesting it be added to the English locale some months ago.... it is there for many non English locales

Thanks Matt for clarifying!

I just filed a bug report. Google is the MOST used search engine, so I don't understand. I would switch my email client because of this and Mozilla should know it.

Since Mozilla does not develop Thunderbird anymore I doubt they care. The volunteer group known as the Thunderbird Council took over Thunderbird a few years ago when Mozilla was done with it.

kaylaartist said

I just filed a bug report. Google is the MOST used search engine, so I don't understand. I would switch my email client because of this and Mozilla should know it.

https://support.mozilla.org/en-US/questions/1241679#answer-1175925

kaylaartist said

I just filed a bug report.

Which was made as a duplicate of Bug 1427133 which Matt has linked to (in reply above) and explained the reason for the search engines being this way.

As for Mozilla well https://blog.mozilla.org/thunderbird/2017/05/thunderbirds-future-home/