TempFox Multi Mail + OTP by arena tech

TempFox puts temporary inboxes, verification-code detection, and user-triggered signup filling in one Firefox popup.

Create an inbox without exposing your primary email address, switch between recent inboxes, read messages as safe text, and copy or paste verification codes when testing low-risk signup flows.

Multiple temporary-mail providers
TempFox integrates several independent temporary-mail APIs, including Catchmail, Mail.tm, Guerrilla Mail, TempMail.lol, Maildrop, InboxKitten, DropMail.me, MailboxTemp, Getnada, and Mail.gw when available.

Rotate across available providers and domains
Select a specific provider/domain manually
Prefer .com, .net, .org, or uncommon endings
Automatically try another provider when an API is unavailable
Keep up to eight recent inboxes locally
Provider availability, domain pools, inbox lifetimes, quotas, and fair-use limits are controlled by each third-party provider and may change. TempFox is free to install, but it does not promise unlimited third-party API access.

OTP and verification codes
TempFox detects common verification-code formats:

numeric codes such as 654321
mixed alphanumeric codes such as A7B9C2
six-letter codes such as ABCDEF
separated codes such as 482-910
Calendar years such as 2026 are filtered so they are not mistaken for OTPs unless explicitly labeled as a code.

Use Paste to page after opening a message, or optionally enable OTP auto-paste. Auto-paste checks only the active tab for a likely OTP field and never submits the form.

Local signup credentials
Each inbox can have a locally generated username and cryptographically random password. Click Fill signup to fill likely email, username, password, and confirm-password fields in the active tab.

User-triggered only
Configurable 12–24 character passwords
Uppercase, lowercase, and numbers
Optional symbols
No automatic form submission