Fastmail Plus

Fastmail Plus

A Firefox extension to make Fastmail web UI more usable and productive

Fastmail Plus promo image
What is Fastmail Plus?

Fastmail Plus is a Firefox add-on by SK. This add-on has 20 daily active users and a perfect 5.0 rating. The latest version,, was updated 4 months ago.

Stats date:
By: SK
Users: 20 ▲ 1
Rating: 5.00 (1)
Version: (Last updated: 2023-02-07)
Creation date: 2022-09-09
Weekly download count: 1
Firefox on Android: Yes
Manifest version: 2
  • storage
Size: 8.85M
Email: Click to see
URLs: Website
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood

Other platforms

Not available on Chrome
Not available on Edge
Fastmail Plus makes Fastmail ( web UI easier to use and more productive. 

- Change focus using ↑ ↓ ← → cursor keys
- Badge notification for unread messages to Inbox
- Faster switch between different search modes 
- Easier button operation in reading pane
- Extra shortcut keys (Press ? key to show available shortcut keys)
- Fix problem with Japanese IME in default search input
- Extra "reply-to" folding
- Maximize width
- Light/Dark theme support

If you have any ideas or proposals, feel free to reach out on github or on twitter.
User reviews
The switchable search box is a killer feature!
by Lesly, 2022-10-04
View all user reviews
Risk impact

Fastmail Plus requires some risky permissions and may not be safe to use. Exercise caution when installing this add-on. Review carefully before installing.

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Fastmail Plus is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on, especially ones with higher risk impact and/or higher risk likelihood.

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