Would not be a problem with me, download source, let the agent search for backdoors and security problems for some hours and it would be fine for me. I would need to do the same with thunderbird if I'd need to trust an UI frontend to my email.
Not sure if this is gaslighting, an absurdist joke, or we are going through a collective psychosis.
KindOfCoders, AI is a very useful tool, but nothing works like the way you're explaining. I am kind of finding it hard to articulate the problem, because the assertion is just a bit wild. So I will do my best.
Thunderbird has been in production use for over 20 years, many many smart people have put their time into it to make sure it works correctly, yes, it is a bit clunky, it has a lot of craft, but you're not going to replace that much labour with running an AI agent for a few hours; despite the AIs usefulness in finding bugs and vulnerabilities. Not yet at least.
Thunderbird won't suffer from prompt injection