Extremely long delays loading pages when extension enabled

[dedworks]

• Multi-Account Containers Version: 7.3.0
• Operating System + Version: Windows 10, Mac OS Big Sur, Mac OS Catalina (happens consistently on windows PC, macbook, and mac mini)
• Firefox Version: 85.0 (64-bit)
• Other installed Add-ons + Version + Enabled/Disabled-Status:

Add-ons
Name 	Type 	Version 	Enabled 	ID
Amazon.com	extension	1.3	true	[email protected]
Bing	extension	1.3	true	[email protected]
DuckDuckGo	extension	1.1	true	[email protected]
eBay	extension	1.3	true	[email protected]
Firefox Multi-Account Containers	extension	7.3.0	true	@testpilot-containers
Google	extension	1.1	true	[email protected]
Wikipedia (en)	extension	1.1	true	[email protected]
Bitwarden - Free Password Manager	extension	1.48.1	false	{446900e4-71c2-419f-a6a7-df9c091e268b}
Cookie AutoDelete	extension	3.6.0	false	[email protected]
Privacy Badger	extension	2020.12.10	false	jid1-MnnxcxisBPnSXQ@jetpack
Reddit Enhancement Suite	extension	5.20.12	false	jid1-xUfzOsOFlzSOXg@jetpack
Shut Up: Comment Blocker	extension	7.0.1.1	false	{b6840179-45a1-4a2d-a4ef-e2815c1faa28}
uBlock Origin	extension	1.33.0	false	[email protected]
User-Agent Switcher and Manager	extension	0.4.6	false	{a6c4a591-f1b2-4f03-b3ff-767e5bedf4e7}

Actual behavior

While browsing, all page changes take 8-10 seconds to begin responding while Firefox Task Manager reads sustained "high energy utilization" for the account containers extension

Expected behavior

Normal page changes in <1sec as I immediately get when disabling the extension

Steps to reproduce

1. Open a web page
2. Read it (problem doesn't seem to resurface until firefox has been running a few minutes - first few loads are always quick)
3. Click a link
4. Tab shows the loading animation for 8-10 seconds before navigating

Notes

• Similar to #1924 except for me it does not require sleep/wake after launching firefox
• I originally had container preferences sync'd with firefox sync, but have been able to reproduce the problem since turning that off
• Disabling and re-enabling the extension (without removing it) deletes all my custom containers and rules, not sure if this is a symptom or just a terrible design decision

[DarthHeizenberg]

Downgraded to 7.1.0, but problem still persists. Happens across OS's as well - seeing same behavior on WinPro64 as well as BigSur - all FireFox v85.0 64-bit

[flanger001]

I have noticed this happen when I leave the browser on and unattended for over an hour. If I disable the extension and then reenable it, the problem goes away temporarily. I don't have the same issue as the OP with it removing my containers, however.

[DarthHeizenberg]

@flanger001 - similar observation here as well. Downgrading to 7.1.0 and restarting the browser makes it all fast again and then load times get longer and longer. Doesn't always take an hour though - I've seen slowness kick back in within 15 minutes on MacOS a few times now.

[flanger001]

Update: I don't know if there has been a recent push on this but I am no longer experiencing these delays. I'm on FF 85.0.2 now.

[flanger001]

Just kidding it's back.

[ghost]

I have been experiencing similar problems running Nightly on Debian Buster. After every browser restart, pages take 15+ seconds to load and my CPU usage shoots up; disabling/reenabling the extension usually fixes the problem until the next restart, though sometimes I have to try it several times before it works. Has anyone taken a look at this? It is obviously very annoying since Nightly needs to be restarted often to install updates.

[ghost]

Update: it appears my problem was likely related to https://github.com/stoically/temporary-containers/issues/371. Turning off sync and deleting the accumulated temporary containers seems to have improved performance.

[rakheshster]

I started experiencing this issue last week across all my machines. Kept disabling add-ons one-by-one until I realized MAC is the culprit. I have two issues - 1) there's a delay in the loading of pages when this add-on is enabled, and 2) after a while Firefox just stops loading anything. I don't have to sleep the computer or anything... it just stops working after a while. Disabling the add-on fixes it.

[akwebb1]

I keep hoping for a fix but on Firefox 95 and the latest plugin update it still starts hanging after sitting unused for a while. This extension is the primary reason for me to use Firefox. Until this is fixed I will be using multiple profiles in a chromium based browser.

[Hoeze]

I have the same issue. I even set up a new firefox profile, without solving the issue. After opening a new tab, loading the page just takes forever. I can open, in parallel, the same page in a different context and it will load immediately.

I think this issue is reported multiple times already:

• https://github.com/mozilla/multi-account-containers/issues/2193
• https://github.com/mozilla/multi-account-containers/issues/2359