1. Search is broken or useless
Many commenters say Thunderbird’s search never finds what they need or returns irrelevant results.
- astameteo: “Search is completely useless, it never-ever finds anything.”
- godelski: “I struggle to get it to search things. Even emails within the last few days. It’ll show me irrelevant mail from years ago but not yesterday’s.”
- CJefferson: “It’s been 14 years since I reported you can't search for 'wedding' in Bugzilla…”.
2. UI/UX feels outdated or wastes space
Critics call the design ugly, clunky, or inefficient on small screens.
- pmkary: “I don't get why Mozilla's designs are so ugly… My eyes hurt for the amount of design problems in Firefox.”
- layer8: “Looking at the screenshots, I don’t have a problem with the aesthetics of the UI, but with how it’s wasting a lot of space.”
- WD‑42 (counter‑point): “I don’t understand people complaining about Firefox UI. It barely exists.” – showing the debate is prominent.
3. Users turn to other mail clients or workarounds
Several participants prefer alternatives like FairEmail, Aquamail, K‑9 Mail, ProfiMail, or Nine, or rely on desktop Thunderbird while awaiting better mobile support.
- jamapy: “I use FairEmail in Android.”
- jdoss: “I have used Aquamail since the mid 2009… It's been solid and it is super customizable.”
- karussell: “Isn't K-9 Mail supposed to join forces with Thunderbird? K-9 Mail works fine for me.”
- ptnpzwqd: “Juggling multiple e-mail accounts in a single client, and I haven't found anything better…”.