Describe the issue

When uBlock has been updated to v 1.13.0 and keyboard layout using right Alt is set then browser (Chrome) enters weird state silently.
In some keyboard layouts eg. Polish (programmer) right Alt/Option is used to type letters with diacritics e.g. Alt+Z = ż.
After update to 1.13.0 this feature had been broken and users need to manually remove/change shortcuts.

Possible solutions:

1. Use left Alt instead of right one (if possible from plugin level)
2. Change Alt to something else
3. At least do not enable conflicting hotkey silently on extension update

Steps for anyone to reproduce the issue

1. Have some keyboard layout set which uses right Alt key (eg. Polish programmer)
2. Update extension to v 1.13.0
3. Try to type e.g. ż
4. Element zapper mode is activated instead

Your settings

• OS/version: macOS/10.12.5
• Browser/version: Chrome/58.0.3029.110
• uBlock Origin version: 1.13.0