We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Videos don't play when trying to use paramount plus

  • 4 replies
  • 1 has this problem
  • 19 views
  • Last reply by cor-el

more options

Hello, Just last week all videos that I watched on Paramount Plus worked fine. Now I get an error message 3304, which seems to indicate that I have an ad blocker active. I have tried everything including trying to use Paramount Plus in Firefox safe mode, with no luck. I know this is not necessarily a Firefox issue, but if anyone has knowledge or experience with this issue, I would greatly appreciate the help. Thanks

Hello, Just last week all videos that I watched on Paramount Plus worked fine. Now I get an error message 3304, which seems to indicate that I have an ad blocker active. I have tried everything including trying to use Paramount Plus in Firefox safe mode, with no luck. I know this is not necessarily a Firefox issue, but if anyone has knowledge or experience with this issue, I would greatly appreciate the help. Thanks

All Replies (4)

more options

Can you show us the issue? Not just the error message, but a full browser screenshot with the issue. This will be hard to replicate without an account.

more options

Here is the screenshot you requested. Thanks

more options

Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection


Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

more options

You appear to have a user agent that is modified by Avast Anti-Track that could be causing problems, so if you do use this software then try to disable it. You will have to contact Avast about this if their software causes problems for you. We can't do much about this apart from identifying Avast Anti-Track as a possible cause.