Any Thunderbird extension is worth install?

A balanced takeaway from that thread is that Thunderbird extensions aren’t really “must-haves”—they’re optional and should be chosen carefully. Several users point out that many features (like encryption or basic workflow tools) are already built into Thunderbird, so extensions often add convenience rather than essential functionality. At the same time, there’s an implicit concern about security, compatibility, and maintenance—extensions can break, introduce bugs, or expand the attack surface if not well-vetted. That aligns with the general privacy mindset of keeping setups minimal unless there’s a clear need. So a practical approach is: install extensions only if they solve a specific problem (e.g., reminders, better search, or UI tweaks), and avoid stacking too many “nice-to-have” add-ons.