kostas-fr3 Reporter
	Description • 7 years ago

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20171009192146

Steps to reproduce:

Loaded 5 tabs and waited for ~30 minutes.

-One of the sites uses Disqus so many comments get loaded, but it wasn't an issue back in stable Firefox 54/55 64-bit: https://i.imgur.com/anwC95e.png (1014,5mb)

-When I closed all the tabs but one, the memory usage was still high(considering I had 1 tab loaded): https://i.imgur.com/P1ogTZT.png (575mb)

-When I loaded the tab I didn't close in the previous image: https://i.imgur.com/bpZ4wja.png (294mb)


Actual results:

Memory leak/High RAM usage: RAM usage. This also happens in latest Firefox 58 Nightly.


Expected results:

Less memory usage and release of unused RAM after closing all the tabs but one.

	kostas-fr3 Reporter
	Comment 1 • 7 years ago

I forgot to mention that the only add-on I use is uBlock Origin and if I leave Firefox opened for an hour or so, the memory can reach 1,6GB usage.

	Selena Deckelmann :selenamarie :selena
	Comment 2 • 7 years ago

Could you go to about:memory. Check "anonymize" if you prefer, and then click "Measure and save"? 

This will help us dig into where the memory is being allocated.

	kostas-fr3 Reporter
	Comment 3 • 7 years ago

(In reply to Selena Deckelmann :selenamarie :selena use ni? pronoun: she from comment #2)
> Could you go to about:memory. Check "anonymize" if you prefer, and then
> click "Measure and save"? 
> 
> This will help us dig into where the memory is being allocated.

here you go https://send.firefox.com/download/3c3f17f136/#vmPrYBkqCDOQC5QqwssgZA

It must be noted that since my initial bug report, I have installed "Tampermonkey" and "Enhancer for YouTube". Also I used Facebook's "messenger.com" and the RAM usage is @ 2,7GB. It's all in the file.

	kostas-fr3 Reporter
	Comment 4 • 7 years ago

(In reply to Selena Deckelmann :selenamarie :selena use ni? pronoun: she from comment #2)
> Could you go to about:memory. Check "anonymize" if you prefer, and then
> click "Measure and save"? 
> 
> This will help us dig into where the memory is being allocated.

Hmmm the link expired, maybe try this link instead https://www.sendspace.com/file/krtaks

	kostas-fr3 Reporter
	Comment 5 • 7 years ago

Another memory report https://www.sendspace.com/file/e70og3
1,9GB. 3 tabs pinned(haven't interacted with any of the 3 since I opened Firefox) and 6 tabs opened.

	u603568
	Comment 6 • 7 years ago

> When I closed all the tabs but one, the memory usage was still
> high(considering I had 1 tab loaded):
> https://i.imgur.com/P1ogTZT.png (575mb)

I don't use Windows, I do wonder what *exactly* is being reported by the Task Manager.

> Another memory report https://www.sendspace.com/file/e70og3
> 1,9GB. 3 tabs pinned(haven't interacted with any of the 3 since
> I opened Firefox) and 6 tabs opened.

From the attached memory report:

- I see 6 processes: Main, WebExtensions, Content, Content, Content, Content.
- The sum of each process' "explicit" is 1084.32 MB.
- The number of opened tabs is 9 (you report 6).
- The main process is 194 MB: seems legit to me.
- You have OOP WebExtensions, and this process consumes ~92 MB.
- There are 4 content processes:
    - 235 MB for 2 tabs consuming 100 MB, 15 MB
    - 236 MB for 2 tabs consuming 91 MB, 25 MB
    - 182 MB for 3 tabs consuming 55 Mb, 24 MB, 7 MB
    - 143 MB for 2 tabs + 1 detached consuming 37 MB, 3 MB, 2-3 MB.

What was loaded in each of those tabs? On my side (FF58) I have 6 "https://" tabs opened, and they consume significant less than what you report (also using uBO). The largest one is a Youtube video which has been playing for a while now: 53 MB.

The sum of all "resident-unique" of each process (main/webext/contents) is
237 + 150 + 303 + 279 + 272 + 243 = 1,484 MB

The sum of all "gpu-committed" of each process (main/webext/contents) is
  0 +   4 +  80 + 111 + 194 + 147 =   536 MB

Is "gpu-committed" something that would be reported by the Task Manager?

I use Linux and there is no entry for "gpu-committed", or anything I could relate and consuming memory.

	Selena Deckelmann :selenamarie :selena
	Comment 7 • 7 years ago

Closing incomplete. MemShrink team will revisit when they can.