carbonio also not supported on old browser for example firefox-esr no longer supported and sadly carbonio doesnt support html view on webmail

Well, windows xp is EOL since 10 years now, I (personally) fail to see why zextras should support it...

About firefox-esr, I am daily using version 115.8 with carbonio, can you be more specific about what's not working and where you read that it's not supported?

We state it's supported: https://docs.zextras.com/carbonio-ce/html/basics/general.html#browser-compatibility

after that u can type on browser

about:config

then press enter

search for

security.tls.hello_downgrade_check

then click i will be carefull or i accept the risk

double click to change value from  true   to  false

Personally, I would never change that configuration option to false, as your browser would accept to connect to any site that uses the old and insecure TLS protocols.

carbonio also not supported on old browser for example firefox-esr no longer supported and sadly carbonio doesnt support html view on webmail

now i have good news for u , carbonio can stil running smoothly on older operating system using palemoon browser (portable)

i found by myself

go this site

https://o.rthost.win/palemoon/

and choose this

https://o.rthost.win/palemoon/palemoon-28.10.7a1.win32-git-20240224-d849524bd-uxp-b33b661414-xpmod.7zpalemoon-28.10.7a1.win32-git-20240224-d849524bd-uxp-b33b661414-xpmod.7zhttps://o.rthost.win/palemoon/palemoon-28.10.7a1.win32-git-20240224-d849524bd-uxp-b33b661414-xpmod.7z

after that u can type on browser

about:config

then press enter

search for

security.tls.hello_downgrade_check

then click i will be carefull or i accept the risk

double click to change value from  true   to  false

u are ready to go and good luck.