When uBlock is used in combination with HTTPS Everywhere in Firefox for Android, uBlock sometimes fails to load.

Tested configurations

I have reproduced the issue on two different Android devices running different versions of the OS (an older version of Android and the latest release).

Browser: Firefox 37 (Fennec)
OS: Android 5.0.2 and Android 4.4.4
Only extensions installed:

• HTTPS Everywhere 5.0.1
• uBlock 0.9.2.4-dev.4 and 0.9.2.3 (settings are default)

Sometimes uBlock does not load at all in browser sessions, but sometimes its loads.

Steps to reproduce

1. Open http://www.theguardian.com/ or http://www.theguardian.com/world
2. Tap Settings > Add to Home Screen
3. Open Guardian webpage via home screen
4. [Observe if uBlock loaded]
5. Go the Android overview and kill the Firefox for clean Firefox session

Going through steps 1 - 5 multiple times you should be able to notice uBlock only loading in some instances.

Also in everyday browsing uBlock just does not start properly when combined with HTTPS Everywhere in Firefox for Android, though using steps 1 - 5 is the easiest way to test multiple Firefox sessions with a single webpage.

Screenshots

Advertisement loaded (In the browser sessions where HTTPS Everywhere loads successfully but uBlock does not). NOTE: HTTPS Everywhere extension always loads but uBlock does not always load

Advertisement not loaded (In the browser sessions where both HTTPS Everywhere and uBlock load successfully)

In cases where ads are loaded (when uBlock fails to load properly but HTTPS Everywhere loads) uBlock has a settings page that looks like this (notice no labels)