Suggestions for Browser and Email Client for 32-bit Win 8.1

[lmacri]

Can anyone suggest a secure browser and email client for an acquaintance who has a "plain vanilla" 32-bit Windows 8.1 machine?

I am aware that Mozilla is ending support for the legacy FF ESR v115.x browser for Win 7 / Win 8.x in Sep 2025 and that FF ESR v115.27.0 (rel. 19-Aug-2025) will be the last FF browser released by Mozilla for these older OSs.  I recommended they try r3dfox (a fork of modern Firefox) or Supermium (a fork of modern Chrome) but would appreciate knowing if someone has another suggestion for a supported browser that still runs on a 32-bit Win 8.1 OS.

I also recommended 32-bit Thunderbird for an email client, but I have no idea if Mozilla as made any similar announcements about dropping support for Thunderbird in the near future for Win 7 / Win 8.x and/or 32-bit OSs, or if there are other email clients that still support 32-bit Win 8.1.
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6218 * Firefox v142.0.1 * Microsoft Defender v4.18.25070.5-1.1.25070.4 * Malwarebytes Premium v5.3.6.205-138.0.5346 * Macrium Reflect Free v8.0.7783 * MS Outlook 2019

Edited 1 hour ago by lmacri