It seems like I now will have to switch to Chrome or IE in order to be able to interact with youtube videos? When I try to save a video to a play list I get a r

Question

Just started having issues when I use youtube. According to what I am hearing about this It seems like I now will have to switch to Chrome or IE in order to be able to interact on youtube ? Is that true? When I try to save a video to a play list I created, I get a red warning pop bar up that says "Invalid Request" and it will not let me do it anymore. Also, I can no longer post a comment on video's that I view either. Do you know what is causing this and is there a fix, without having to switch to Google Chrome of IE?

Answer 1

According to some forum posts, this is a side effect of one or more downloaders, such as Download Helper. You either can disable that add-on while this is worked out (assuming no update has yet been issued) or try modifying one of its preferences in the about:config preference editor.
References:
* YouTube support: [http://productforums.google.com/forum/#!topic/youtube/8Y_88ywjBrk%5B1-25-true%5D Why do I get message "Your settings could not be saved: Invalid request, authentication expired."? - Google Groups]
* Reddit: [http://www.reddit.com/r/firefox/comments/1f1udb/youtube_error_only_on_firefox_your_settings_could/ YouTube error only on Firefox: "Your settings could not be saved: Invalid request, authentication expired." : firefox]
On the preference change, here are the steps. Note: I haven't tried this myself.
(1) In a new tab, type or paste '''about:config''' in the address bar and press Enter. Click the button promising to be careful.
(2) In the filter box, type or paste '''dwh''' and pause while the list is filtered
(3) Double-click '''dwhelper''.''yt-visitor-cookie''' and edit the value from remove to keep. Reload the YouTube page and try saving the video to your playlist again.
(Note: if the formatting looks funky in the email notification, please view on the forum.)