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Empty preview windows on YouTube

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Empty preview windows on YouTube

Well here's the screenshot of my problem: http://img177.imageshack.us/img177/7263/flashorsomething.jpg

As you can see preview windows on YouTube don't load. Also - user menu won't show.

I think it's a problem with flash plug-in, since the problem started right after I was updating it (even though I didn't need to I guess). And that leads to another problem; I tried to update it since instead of videos on people's profiles I would get error saying that I got Java Script disabled or old Flash version - it was wrong then, it is wrong now - now, cause it still gives me that error.

I post here, because on Google Chrome YouTube works perfectly fine.

I tried to reinstall flash, didn't help. Some suggestions?

EDIT: Also, now I see that YouTube on Firefox got some basic problems with functionality, like can't view "more" of videos description and so on... eh. It gots to be flash or something.

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Accepted Solutions
New Contributor

Re: Empty preview windows on YouTube

Interestingly enough I had this problem and spent the last 3 hrs tracking it down with the help of several VMs and about:support... but stranger yet is that I searched for Dom.storage.enabled (the key to the solution) and ended up here via google, even though that string is nowhere on this page... how odd (old cached copy?? if so, why was that comment/reply [re]moved??).

Anyways, I wanted to say that I fixed this by searching my variables in about:support as it filters out only the core browser vars that have been changed from defaults, as there are way too many to sort through if you have to root through about:config looking at every extension vars. (Note to devs: it would be handyto have multi-word inline search as well as the option to filter out non-built-in variables in about:config --> would make for some speedier problem resolutions)

The solution? Dom.storage.enabled was improperly set to FALSE. No clue what changed it, but it was definitely something in the last couple of days. I could view youtube videos individually, but would get the "Hello... javascript is disabled or you have an old version of flash" msg on any channel's main page. Also, I couldn't click on any of the java?-based controls on youtube, such as the like/dislike et. al. below videos, the menu that dropped down when clicking on your profile name in the upper-right, and many other issues as well. I also couldn't click on any "javascript:" links (nothing would happen) on, for ex., Asus' support site, among countless other oddities that have all been fixed with the solution below. I'm sure this would all make perfect sense if I knew a little more about the DOM storage but for now a rough practical description will have to do.

For those who skipped the above paragraph, here's the quick fix: Go to about:config and set dom.storage.enabled to TRUE and, unless you have other problems as well, you should be in good stead.

Registered just to share this one as we all need to give back to the help forums once in a while, eh?

~BC

37 REPLIES
New Contributor

Re: Empty preview windows on YouTube

Recently flash and java updates were available and installed then yesterday things brgan to go wrong when working in youTube until finally I got this error and javascript and flash seemed to stop working on main channel pages.

"Hello, you either have JavaScript turned off or an old version of Adobe's Flash Player. Get the latest Flash player. " i could watch videos off of the main pages. Javascript on the main page (for example switching between uploads/favourites and so on is impossible).

I played around with plugins and add-ons and nothing working I reinstalled Flash player 10,1,85,3 , I reinstalled Firefox 3.6.12 and even tried a system restore. YouTube worked fine in IE but not Firefox.

My only extension is addblock plus.

I do not allow cookies by default but this never caused problems before. I experimented with allowing a session cookie from YouTube and javascript worked. I don't have to be logged in I just have to have a cookie to make javascript work.

New Contributor

Re: Empty preview windows on YouTube

Interestingly enough I had this problem and spent the last 3 hrs tracking it down with the help of several VMs and about:support... but stranger yet is that I searched for Dom.storage.enabled (the key to the solution) and ended up here via google, even though that string is nowhere on this page... how odd (old cached copy?? if so, why was that comment/reply [re]moved??).

Anyways, I wanted to say that I fixed this by searching my variables in about:support as it filters out only the core browser vars that have been changed from defaults, as there are way too many to sort through if you have to root through about:config looking at every extension vars. (Note to devs: it would be handyto have multi-word inline search as well as the option to filter out non-built-in variables in about:config --> would make for some speedier problem resolutions)

The solution? Dom.storage.enabled was improperly set to FALSE. No clue what changed it, but it was definitely something in the last couple of days. I could view youtube videos individually, but would get the "Hello... javascript is disabled or you have an old version of flash" msg on any channel's main page. Also, I couldn't click on any of the java?-based controls on youtube, such as the like/dislike et. al. below videos, the menu that dropped down when clicking on your profile name in the upper-right, and many other issues as well. I also couldn't click on any "javascript:" links (nothing would happen) on, for ex., Asus' support site, among countless other oddities that have all been fixed with the solution below. I'm sure this would all make perfect sense if I knew a little more about the DOM storage but for now a rough practical description will have to do.

For those who skipped the above paragraph, here's the quick fix: Go to about:config and set dom.storage.enabled to TRUE and, unless you have other problems as well, you should be in good stead.

Registered just to share this one as we all need to give back to the help forums once in a while, eh?

~BC

New Contributor

Re: Empty preview windows on YouTube

I should also mention that I had tried all of the normal things to fix that common error message, un/reinstalling java, flash, killing adblock etc (eventually did a safe mode start with all options checked and it didn't fix it, leading me to the few things a full safe start doesn't change --> browser vars)... None-the-less, if you're having other issues besides this, you may have whatever issue was solved by the reinstallations I just mentioned. try those as well.

New Contributor

Re: Empty preview windows on YouTube

Actually your fix: "Go to about:config and set dom.storage.enabled to TRUE " solved it all.

Like in your case I had it set to False, nobody knows why.

Anyways, thank ya very much for this.

New Contributor

Re: Empty preview windows on YouTube

One other note: I had tried several methods of testing java and flash installations to ensure they were working properly, including the official test sites, and all signs were that they were working fine, so throw that on top of the pile too.

Lastly, if anyone knows more about the DOM storage and/or knows what happened to either toggle this variable OR suddenly activate its use by firefox/flash/java etc. please comment. I have a feeling it was toggled rather than activated but would be curious to know if anyone has a clue as to what [could have] caused this. I have two environments, with JRE22/21 and flash 10.1.85.3 that were both affected at the same time and hadn't been updated recently (other than java on the JRE22 machine), so I'm at a loss for explanation so far as a smoking gun is concerned.

~BC

New Contributor

Re: Empty preview windows on YouTube

Np... glad I could help... I'm getting an odd feeling like this is going to be a bigger issue than just this thread... like I'm going to wake up and get many calls from clients suddenly asking me what's wrong with their FF... ;-)

I'll cross my fingers that I'm wrong.

New Contributor

Re: Empty preview windows on YouTube

DOOOOMED! Smiley Tongue

Well, but yeah, it was kinda weird, never happened before, and there was no special reason (that I could notice ofcourse), besides updating that flash plug-in.

I don't know, I'm kinda noobie in here, everything works perfectly fine now, will see about the future. Thanks again though.

New Contributor

Re: Empty preview windows on YouTube

http://kb.mozillazine.org/Dom.storage.enabled

Last update... it looks like this is related to an HTML5 spec called Web Applications 1.0 that specifies the requirement(?) for this persistent cookie repository. Youtube is aggressively using HTML5 on many parts of their site so it's possible they just made a change to it that now requires this to be enabled and perhaps it wasn't the default on older builds of FF. No time to test but if someone wants to follow up I'd suggest grabbing 3.6 vanilla, 3.5 vanilla etc. as this was apparently checked in in 2006, meaning it could have been implemented but disabled long ago, eventually being grandfathered in through update after update until now it's causing problems in 3.6+ when it has now been changed to default=TRUE. Just a hypothesis as I tweak/extend the hell out of my browser but have never done anything that could conceivably touch that var.

~BC

New Contributor

Re: Empty preview windows on YouTube

yes! thank you. Setting the DOM.STORAGE.ENABLE = TRUE did the trick. And for those that don't know .. you put "about:config" in the location bar in firefox.. (ie. the url)