#80 Permalinks are broken in Firefox

[Dennis]

Whenever code or input contain a hash sign, the resulting permalink is broken in Firefox.

This seems to be caused by the fact that Firefox performs URI decoding on the hash before decodeURIComponent, so the string is decoded twice.

For most characters, this doesn't matter. However, W%25z -> W%z results in an error message in Firefox, since %z cannot be decoded.

[Dennis]

As a temporary workaround, % can be encoded twice as %2525 for Firefox. However, this breaks the code for Chrome.

[aditsu]

Seems to be fixed in Firefox version 41: https://bugzilla.mozilla.org/show_bug.cgi?id=1093611
I did some work on this: http://chat.stackexchange.com/transcript/240?m=23871298#23871298 but I'm not sure if it's needed anymore.