LocalStorage crash with Firefox no history

Problem Description

Localstorage crash with firefox NO HISTORY

Attach a Capx

https://dl.dropboxusercontent.com/u/157 ... refox.capx

Description of Capx

The capx just chek if local variable exist

Steps to Reproduce Bug

Open the preview

Observed Result

Error message javascript

https://dl.dropboxusercontent.com/u/157 ... _error.JPG

Expected Result

No error message javascript

Affected Browsers

Firefox 50.1.0

OPTIONS

https://dl.dropboxusercontent.com/u/157 ... ptions.JPG

Operating System and Service Pack

Windows 7 32bits

Construct 2 Version ID

Construct 2 r239

Dang, this results in uncatchable exceptions in the underlying library. There's not an obvious way for us to handle this. I filed a bug for it here: https://github.com/localForage/localForage/issues/647