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user_j0pixf
1st Topic

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1 Message

10/31/2026 5:04 PM

Subject: Xfinity Stream website loses its session on tab switch in Firefox — works fine in Edge and in a clean Firefox profile

Issue: On xfinity.com/stream (Xfinity Stream website), the Sign In button returns every time I switch away from the browser tab, even briefly. Returning to the tab shows the page intact but requiring a fresh "Sign In" click, which then re-authenticates silently — no username/password is requested. This proves my login cookies are intact; the Stream web app is discarding its own client-side session state whenever the page loses visibility.

Environment:
- Windows 11 (64-bit), Firefox 159.0 — latest release, fully up to date (also affected on Firefox 158.0.1)
- Microsoft Edge on the same PC, same network, same account: works perfectly — session survives tab switching with no sign-in prompts
- Reproduced in a completely clean, default Firefox profile (no extensions, no custom settings, fresh cookies) — same failure, so this is not caused by any user configuration on my machine
- Other sites (e.g., YouTube) hold their sessions fine in the same Firefox tab set; only Xfinity Stream loses state

Troubleshooting already performed in Firefox:
1. Updated to latest Firefox release (159.0)
2. Cleared all Xfinity cookies (69 stale tokens) and signed in fresh
3. Permanent cookie-allow exceptions set for xfinity.com and stream.xfinity.com
4. Enhanced Tracking Protection disabled for those domains
5. Firefox background tab unloading disabled (browser.tabs.unloadOnLowMemory = false)
6. Firefox background-timer throttling disabled (dom.min_background_timeout_value = 4, timer budgeting off)
7. Verified zero Firefox content-process crashes (Windows event log and Mozilla Crash Reports clean)
8. Full PC restart; behavior persists in Firefox only
9. Fresh-profile reproduction test with entirely default settings — same failure

Expected behavior: Stream session persists across tab switches in all major browsers.

Actual behavior: The Stream web app forfeits its in-page session in Firefox whenever the tab is backgrounded — including on entirely default settings — while working correctly in Edge under identical conditions on the same PC, network, and account. This is an Xfinity Stream web app compatibility defect with Firefox specifically, consistent with publicly reported Stream website issues previously acknowledged by Xfinity support.

Impact: Made effectively disruptive for watching television in one window while working in another; a click-through sign-in is required after each brief tab switch in Firefox only.

Question

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8 minutes ago

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XfinityBenjaminM

Official Employee

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3.6K Messages

13 days ago

 

user_j0pixf Hello! Thank you for reaching out to us here on our Community Forum. The issue you're having appears to be a known issue between Firefox and Xfinity Stream, which is why you only see this happening in this scenario. There is a workaround that seems to be working for other users who have brought this to us.

Please try disabling 'Enhanced Tracking Protection'

1. Go to our Xfinity Stream site.
2. Click on the 'Shield Icon' to the left of the address bar.
3. Toggle the switch off for 'Enhanced Tracking Protection'.

See if that helps! Please let us know if you have any other questions or concerns.

 

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biddybiddybop

Contributor

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13 Messages

10 days ago

I came here to report the same issue.  I already have Enhanced Tracking Protection disabled for https://www.xfinity.com/stream/
I'm on Firefox 159.0.1 (64-bit) on Windows 10 Pro

I used the Firefox "Report Broken Site" feature (Help and Report section) to report the issue with them as well, and linked to this forum post.

(edited)

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XfinityJon

Official Employee

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2.1K Messages

Good evening biddybiddybop are you still experiencing issues at this time?

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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8 days ago

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biddybiddybop

Contributor

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13 Messages

@XfinityJon​ Yes.  Constantly refreshing after switching tabs and being presented with the "Sign in" button every time.      

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8 days ago

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XfinityBenjaminM

Official Employee

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3.6K Messages

 

biddybiddybop If you use a different browser other than Firefox does the Xfinity Stream work properly?

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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7 days ago

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biddybiddybop

Contributor

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13 Messages

@XfinityBenjaminM​ Yes.  Edge works fine.

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7 days ago

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XfinityBenjaminM

Official Employee

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3.6K Messages

Ok! We'll need to take a closer look at this for you and see why this is happening with Firefox. Please send a Direct Message with your full name and address.

 Click "Sign In" if necessary
  • Click the "Direct Message" icon (upper right corner of this page)
  • Click the "Start a New Conversation" (pencil and paper) icon
  • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
  • Type your message in the text area near the bottom of the window
  • Press Enter to send your message

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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7 days ago

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user_oskgri

3 Messages

8 days ago

Xfinity Streaming broken here also, just as user_j0pixf described.  Currently running Firefox v 159.0 64 bit latest Windows 11 version.

Streams great with Edge.

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user_47b73s

Visitor

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2 Messages

7 days ago

I've tried all the fixes that have been suggested to no avail.  Switch tabs, lose xfinity stream.   Works fine in Edge, so at the moment I need two browsers open to watch xfinity stream.

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XfinityRaul

Official Employee

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3.3K Messages

@user_47b73s Have you by any chance tried the troubleshooting step my colleague shared above? If not, please try disabling 'Enhanced Tracking Protection'

 

1. Go to our Xfinity Stream site.
2. Click on the 'Shield Icon' to the left of the address bar.
3. Toggle the switch off for 'Enhanced Tracking Protection'.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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5 days ago

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user_tlho1k

Visitor

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1 Message

7 days ago

I'm having the same issue - do you have a fix for this xfinity?????

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biddybiddybop

Contributor

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13 Messages

5 days ago

I just updated to the latest Firefox 160.0 and the problem persists.

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user_47b73s

Visitor

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2 Messages

5 days ago

Yes, I did turn the Enhanced Tracking Protection off.  It did not solve the issue. 

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XfinityJustinC

Official Employee

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2.7K Messages

@user_47b73s I appreciate you following up and attempting to turn the enhanced tracking protection off, and the issue is still persisting after the additional troubleshooting you did previously. 

I'd like to continue investigating, and will need to gather some information we don't want here in our public conversation. Could you please send our team a direct message with your full name and full address?

 

To send a direct message: 

Click "Sign In" if necessary

• Click the "Direct Message chat" icon

• Click the "Start new conversation" (pencil and paper) icon

• In the "To:" line type "Xfinity Support" as you type the drop-down list which appears. Select the "Xfinity Support" graphic replaces the "To:" line

• Type your message in the text area near the bottom of the window, please add your full name and address

• Press Enter to send it


https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1e570934d009185c514

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
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5 days ago

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user_8dd4n4

Visitor

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2 Messages

Also having this issue. It was worse after the first release of 159, as I'd get signed out of everything xfinity, email, streaming, etc. After a 150.x.x update, it got better and only streaming was affected, taking me to the sign in page everytime I put the tab Xfinity streaming was playing on in the background. Did a lot of troubleshooting, turned off enhanced protections and tried a few about.config settings, but nothing worked. Updated to FF 160 and it still happens. Chrome, Edge work without issue. No other media issues on PC.

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5 days ago

XfinityVictor

Official Employee

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2.7K Messages

 

user_8dd4n4 Hello, I am sorry you are having issues with our Stream app on Firefox. I am happy to be of assistance. Are you still having issues with the application?

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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3 days ago

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user_8dd4n4

Visitor

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2 Messages

@XfinityVictor​ Still happening, but I think it's a Firefox issue, as that's the only browser it happens on. It's behaving just as the OP issue on this thread now. All other Xfinity pages working correctly, email, etc.

I don't really need to troubleshoot it, just making you aware.

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3 days ago

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XfinityVictor

Official Employee

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2.7K Messages

 

user_8dd4n4 OK, we are here to help if you need us. Is there anthing else we can assist you with?

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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3 days ago

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user_u85vk4

Visitor

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4 Messages

6 hours ago

Just go to FireFox Icon on task bar and hit open new window. It does not do it to me when I go that rout. I think it is  intentional to frustrate you into turning off a tracking feature so the PIGS can make money of your privacy.

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stevefrench

Visitor

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1 Message

8 minutes ago

I've been having the same issue starting about 2 weeks ago. Has worked fine for years. Turning enhanced tracking protection off does not solve for me.

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