Greasy Fork is available in English.
Highlights e-mail replies with different colours per quotation level in lines preceded by ">", ">>" etc.
Highlights e-mail replies with different colours per quotation level in lines preceded by ">", ">>" etc.
Currently the script is configured to work for web mailers of
There is also a manual version of this script which can be called from the browser's context menu (works in Tampermonkey for Chromium-based browsers) in case automatic highlighting fails on GMail or for non-supported web mailers.
You can install both versions of the script side by side.
P.S.: I would be happy to add more web mailers to the automatic script if they are reported to work when called manually, but you can also just additional include URLs to the automatic version by yourself via Tampermonkey user script settings.