lagging with Firefox 54.0 + Flash 26.0 r0 (Linux)

UNCONFIRMED
Unassigned

Status

()

Core
Plug-ins
P5
normal
UNCONFIRMED
3 months ago
3 months ago

People

(Reporter: Andy Hiscock, Unassigned)

Tracking

54 Branch
x86_64
Linux
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

Attachments

(1 attachment)

(Reporter)

Description

3 months ago
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID: 20170612122310

Steps to reproduce:

Update Firefox (linux) from version 52 to version 54.  Flash version 26.0 (remains untouched before and after upgrade)


Actual results:

After upgrading Firefox (linux) to version 54 introduces serious lag when Playing Settlers Online (Web/Flash based game).  Lag seems to happen when the mouse is clicked.


Expected results:

No lag during game play as with previous version of Firefox.
(Reporter)

Comment 1

3 months ago
Have trued Ubuntu, fedora, Suse linux, all have the same issues.  All installations "upto date"

Updated

3 months ago
Component: Untriaged → Plug-ins
OS: Unspecified → Linux
Product: Firefox → Core
Hardware: Unspecified → x86_64
(Reporter)

Comment 2

3 months ago
Created attachment 8886836 [details]
Screenshot from 2017-07-16 09-01-39.png

Attached screenshot showing plugins

Comment 3

3 months ago
The probable cause of this is that we forced all Flash elements into windowless mode on Linux. This is a tradeoff we made to support multi-process browsing, and makes the browser faster in general but causes painting slowness for large Flash elements/games.

Given the declining state of Flash, Mozilla isn't going to dedicate a lot of engineering resources to this (P5). I'll leave this open in case somebody comes along and wants to do profiling and identify a problem we can fix.
Priority: -- → P5
(Reporter)

Comment 4

3 months ago
Is there a way to re-enable flash into windowed mode?

Comment 5

3 months ago
No. The code that supports windowed mode has been completely removed.
You need to log in before you can comment on or make changes to this bug.