What Ad blocker(s) do you have ? Did you try to disable all ad blockwers? Do you allow both Audio and Video on the Spotify website ?

• https://support.mozilla.org/en-US/kb/block-autoplay

You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsafe content.

• https://firefox-source-docs.mozilla.org/devtools-user/web_console/

You can check the Network Monitor to see if content is blocked or otherwise fails to load.

• https://firefox-source-docs.mozilla.org/devtools-user/network_monitor/

If necessary use "Ctrl+F5" or "Ctrl+Shift+R" (Mac: Command+Shift+R) to reload the page and bypass the cache to generate a fresh log.

1. I only have uBlock Origin. 2. Yes, I have tried disabling it. Still nothing / no changes. 3. I have now allowed both Audio and Video for Spotify website. Still nothing / no changes.

4.After accessing the Web Console, I could only filter out one (1) and two (2) console messages containing the words "block" and "content", respectively.

Filter results for block A. Request to access cookie or storage on “<URL>” was blocked because it came from a tracker and content blocking is enabled. 5

Filter results for "content" A. Content-Security-Policy warnings 4 B. Request to access cookie or storage on “<URL>” was blocked because it came from a tracker and content blocking is enabled. 5

Could you take a look at the attached images of the following below, and see if there are indicators/messages I may be missing? > Full text of the filtered console messages. > All Warnings > All Errors

5. Checking the Network Monitor leads to all requests with 200 (okay) status. 6. Done reloading the page. Still nothing/no changes.

Try disabling Tracking Protection for the site.

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile.

You can check for issues with Total Cookie Protection.

• https://support.mozilla.org/en-US/kb/total-cookie-protection-and-website-breakage-faq
• https://support.mozilla.org/en-US/kb/introducing-total-cookie-protection-standard-mode

You can check for issues with Enhanced Tracking Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

• click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages like blocked content.

• https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop
• https://support.mozilla.org/en-US/kb/total-cookie-protection-and-website-breakage-faq
• https://support.mozilla.org/en-US/kb/trackers-and-scripts-firefox-blocks-enhanced-track

By the time that I am writing this reply, I've done only two things after following zeroknight's reply:

1. Disable tracking protection - Still nothing / no changes

   > I proceeded to check the Console after disabling, please see results in attached images.

2. Installed the Developer Edition

   !! The site is working as normal. Song plays, no skipping, no muting.
   >  I proceeded to check the Console, please see results in attached images.

Following cor-el's latest reply, the only additional info I could share is that I checked the following below, under "How do I know if the site breakage is caused by Total Cookie Protection?" > network.cookie.cookieBehavior is set to 5 > I haven't changed this yet because of the warning about doing it only for advance users.

I haven't read the articles under Enhanced Tracking Protection because of the results following #1. If relevant, I have screenshots of the sites that are blocked when Enchanced Tracking Protection is on - currently two are blocked: Social Media Trackers and Cross-Site Tracking Cookies.

Please advice what to do next following #2.

You can change the cookie settings via "Settings -> Privacy & Security" via the custom settings.

Selecting "Cross-site tracking cookies" sets network.cookie.cookieBehavior to '4' and does not partition/isolate cross-site cookies, but still keeps Enhanced Tracking Protection enabled. Selecting "Cross-site tracking cookies, and isolate other cross-site cookies" sets network.cookie.cookieBehavior to '5' and enables Total Cookie Protection.

I've changed it now, it's still the same, it didn't fix the site.

If it works in Developer Edition and you can't figure out what setting is responsible, the next thing would be to test a new profile with normal Firefox and possibly refresh your existing profile.

I've made two attempts at creating a new profile under the normal Firefox. 1. First profile

   > upon start-up, I've imported bookmarks from HTML, then synced my mozilla account.
   > Logged-in to Spotify . The issue still persist.

2. Second profile

   > upon start-up, I clicked "Skip for now" 
   > Logged-in to Spotify. The issue still persist.

I've now finished refreshing my existing profile. The issue still persist.

Are you still on version 119? You can update to 120 now by downloading the latest installer.

Thank you for informing! Just updated to 120 now, and it sure did fix the website, finally.

Thank you both for the help.

Are you still on version 119? You can update to 120 now by downloading the latest installer.

I've been having the same issue. I just updated to 120 and it hasn't fixed the problem.

There seems to have been a similar issue a few years ago (It's on the spotify forums), but I'm not exactly sure if there is a Firefox equivalent to the 'Clear Active Connections' setting that was mentioned, or where to find it if so.

At the same time that I started having this issue (a few days ago), Disney+ also started consistently giving me an 'Error 83' and not playing videos. Wondering if it might be linked?

[Link To The Spotify Forum Post]