Problem with Firefox

Very strange! Which Firefox version? Any out of the ordinary plugins?

This isn't necessary, but would probably be useful for debugging:

In Firefox, after you have the error, press F12, then if you're not already on it go to the Network tab and then refresh the page.

Uploading a screenshot of what appears there would probably help David know what's going on.

Firefox 50.1.0. It's the up to date version. No add ons or unusual plug ins. I tried clearing the cache as well, but still getting the error.

Technical FYI: today we pushed a change to enable opportunistic HTTP encryption, so I guess it's related to that. It works fine on all of my Firefoxes though, both desktop and mobile.

I checked the network tab. There's around 21 "307 Temporary Redirect" responses. It's using HTTP 2.0 by the way which is a major revision to HTTP.

dpratt wrote:
Firefox 50.1.0. It's the up to date version. No add ons or unusual plug ins. I tried clearing the cache as well, but still getting the error.

Very strange. There must be something in your browser, computer or network that's messing with the HTTP connection.

Could you indeed make a screenshot of the developer console (F12), while selecting one of the requests that failed (most likely a 301/302/307. What I have to see specifically is the request headers that were used.

Host: www.tvmaze.com

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: http://www.tvmaze.com/

Cookie: [removed]

DNT: 1

Connection: keep-alive

Upgrade-Insecure-Requests: 1

Here's what was returned (with status 307)

Alt-Svc: h2=":443"; ma=86400

Content-Type: text/html; charset=UTF-8

Date: Tue, 03 Jan 2017 20:37:52 GMT

Location: http://www.tvmaze.com/calendar

Server: nginx/1.10.0 (Ubuntu)

X-Content-Type-Options: nosniff

X-Firefox-Spdy: h2

x-frame-options: SAMEORIGIN

x-xss-protection: 1; mode=block

Yeah, so your Firefox is misbehaving: it should be sending an "Alt-Used" header. It doesn't appear to be a widespread problem though, it's working fine for all my Firefox instances and there are currently lots of other succesful visits from Firefox.

Sure there are no weird plugins/addons interfering?

What should the value of Alt-Used be?

Even if my Firefox is to blame, isn't there some way to detect and compensate for infinite redirect loops?

No issues here on firefox though. Hope it's getting sorted for you.

P.S. I disabled all of my add-ons. And my plug ins are just standard stuff like Flash and Silverlight.

Which OS do you use?

Windows 7

also on Windows 7, just tested my Firefox, all fine here.

Just to check, for "Alt-Used" where you checking under Response Headers or Request Headers as it's the second one that would have it.

P.S It shows on mine as www.tvmaze.com:443

I have also the same Problem as "dpratt". I'm using Win 8.1 and Firefox 50.1.0 and i got the same error message.

Ugh. I've rolled back the feature for now then. Unless you restart your browser/clear history it might take up to a day before it's propagated to you though.

Wonder if we'll ever find out what's causing it. Perhaps an anti-virus that's messing with Firefox?