Cannot use customizer with Safari 6.1

[KoulSlou]

Hello,

When I'm trying to download customized bootstrap 3 file in Safari new empty tab is opened and nothing happened. At the same time in Firefox I was able to download file.

Safari version: 6.1 (8537.71)
OS: OS X 10.8.5

Regards,
Tamara.

[cvrebert]

Duplicate of #12547, although in hindsight I should have reopened that one after the follow-up comments, so leaving this open.

[mdo]

Safari support is super limited. Guessing our banner isn't showing up for those folks (see end of customize.js file).

[daviian]

I have Safari v7.0.1 and it doesn't work for me neither.

Get exactly the same error.

[ssorallen]

I can't track down where WebKit changed, but it looks like blob: URLs stopped working in Safari 7. There's a bug open for FileSaver.js tracking this same problem: eligrey/FileSaver.js#12 Until Safari fixes that problem, this will need a workaround.

I did get it working with JSZip and a base64 data: URL instead of going through FileSaver, but the resulting file Safari downloads is simply named "Unknown" (with no extension). It would work, but the experience would be awkward: "Click this button, look for a file named 'Unknown', rename it to bootstrap.zip". It's definitely less bad than, "Using Safari? Too bad." but not by a lot.

[mdo]

Safari is the third most popular browser used to access the docs. Whatever we do, we should be super up front about it and as helpful as possible.

[cvrebert]

Consolidating into #12617.