You can ignore the square shown in the popup and draw the gesture starting from the edge of the screen — that will work.
(The popup design hasn’t been updated to clearly indicate edge gestures yet, so it can be a bit confusing...)

I am so sorry!
I think it's fixed in 3.34.1, but if it doesn't work, I'll overwrite it with the version 3.33.2!

Oh, sorry.
I supported two-finger swipes, but forgot to support two-finger taps.
Might take some time.

I create a new issue.
https://github.com/utubo/firefox-simple_gesture/issues/102

thanks.

(2025/06/08)

v3.30 supports it.
(But 2 or more fingers double-tap is not yet supported.)

thank you for your review.

> Please add gesture for switching tabs.
The API provided by Firefox is unstable, but you can use it by turning on “Enable experimental features” on the settings page.

> And maybe add two finger swipes.
Sorry, it will take some time to work on this.
I'll add it to the issues list.
https://github.com/utubo/firefox-simple_gesture/issues/99

Thank you for your review.

2025/02/25
> And maybe add two finger swipes.
v3.27 supports this.

This needs clip-board access though for custom gestures (=user script).
I will summarize the permissions.
Thank you for your review

(2024/07/20)
> I will summarize the permissions.
I done. (see About Extensions)

Sorry, Firefox for Android does not support the Bookmarks API for add-ons.😢
Thank you for your review.

> the notifications including timeouts could be hidden.

I fixed to hide the timeouts when 'Diaplay Command' is disabled in v3.12.2.
Thank you for your review.