Download doesn't start with Firefox 33 on master

[XhmikosR]

So I tried the latest master locally with Firefox 33b9. Apparently the download doesn't even start.

Chrome and even IE 10 work fine.

Also, when I try the same link (http://getbootstrap.com/customize/?id=df4c84787ac4f3ff0a5a) on the gh-pages customizer that is published I get

Ruh roh! Could not parse less files.
@gray-darker: lighten(@gray-base, 13.5%);
@gray-dark: lighten(@gray-base, 20%);
@gray: lighten(@gray-base, 33.5%);

I'm not sure if these are 2 separate issues at this point. But locally I don't see any warning at all, not in the console not anywhere else. Are we sure the files on the gh-pages branch are properly updated?

[XhmikosR]

Something seems broken with Firefox, I can't explain it otherwise. Can someone else confirm this (for the first issue)?

[cvrebert]

I can confirm with Firefox 32.0.3 against master. Interestingly, I was able to get it to download at least once when stepping through it in the debugger a bit.
Possibly it's some new drive-by-download protection?

[cvrebert]

Sounds like eligrey/FileSaver.js#108 ?

[XhmikosR]

BTW, I also tried the docs-libs branch which has those updated; still the same issue. My thought was FileSaver too, so that must be the same issue.

How about the current live customizer? It seems to me like the files on gh-pages aren't all the right ones hence the parsing error.

[cvrebert]

The current live customizer still works fine for me.

[XhmikosR]

With the link I posted above? http://getbootstrap.com/customize/?id=0c580644eab4f54378fa

On a side note, I get both the parsing error and the success! your configuration blah blah...

[cvrebert]

Ah, that link is erroring. Not necessarily related though.

[XhmikosR]

OK, for the live customizer I think it's just the files that aren't correctly updated on gh-pages. I'll try to have a look later unless someone else beats me to it.

[cvrebert]

I think it's just the files that aren't correctly updated on gh-pages

Considering we haven't had any other complaints about the customizer, I am doubtful of that explanation.

[cvrebert]

Looks like @gray-base isn't part of the generated pseudo-variables.less for some reason.

[cvrebert]

Er, wait, you're mixing a Gist generated from the master customizer with the hosted customizer for v3.2.0, that's the @gray-base problem.

[XhmikosR]

You are probably right about that. So I guess this doesn't affect the live customizer. Only the issue with current master and Firefox 33.

[cvrebert]

My speculation and initial testing suggests that our replaceState call is somehow interfering with the file saving, which is done by clicking an invisible blob: link.