A camera app for reenacting photos: Young Me, Now Me; daily timelapses; pregnancy belly pictures -- if you need to take two pictures from the same angle, Reenact them.
Reenact can be installed on Firefox OS by visiting the Firefox Marketplace: https://marketplace.firefox.com/app/reenact/ It requires at least version 2.5 of Firefox OS.
The icons in
/img/icons/ (except the app icons) are from the Android Asset Studio (https://romannurik.github.io/AndroidAssetStudio/) and are licensed under the Apache license.
/audio/shutter.opus is from the stock Firefox OS camera app: https://github.com/mozilla-b2g/gaia/blob/master/apps/camera/resources/sounds/shutter.opus