Hi Jordan,

Firefox 47 disabled XRender support by default. Go to about:settings and search for xrender, set the property to true. That made it a lot better for me.

Stefan

> Date: Sat, 27 Aug 2016 12:34:32 +0300

> From: Jordan Sokolic <jordan@twiggle.com>

> To: x2go-user@lists.x2go.org

> Subject: [X2Go-User] Web browser performance over X2Go

> Message-ID:

> <CAFbFDtijPrfER_DEu+zM11N08FKb_Zn-WdUEkR99AQN1zZ9o=Q@mail.gmail.com>

> Content-Type: text/plain; charset="utf-8"

>

> Hello,

> I use a web frontend for work that runs locally on my server over X2Go for

> about one year with success.

> Some months ago I noticed a significant decrease in performance when using

> Firefox. My server is running Ubuntu 16.04 with MATE desktop, Windows 10

> client. Up to Firefox version 39.0.3 performance of loading pages,

> scrolling, browsing etc. was nearly flawless over a 5Mbit WAN link (with

> the exception of embedded video elements). However it seems the release of

> Firefox version 40.0 introduced some changes in rendering (see

> https://www.mozilla.org/en-US/firefox/40.0/releasenotes/) that do not play

> nice with X2Go. Further reduction in performance was noticed in versions

> 46.0 and 48.0. The current release (48.0) even has trouble rendering a

> plain text document without lag and choppiness.

> I have tried toggling various flags relating to graphics, compositing,

> rendering, etc. to no avail.

> To work around this problem the only solution I have found is to forward

> ports over a separate SSH tunnel and browse locally, but this is cumbersome

> to set up every time I need to connect.

> I have preferred Firefox to Chrome over X2Go because the latter has always

> been unusably slow; now they are both similarly choppy and slow.

> Has anyone else noticed this?

> Any advice or help would be appreciated.

>

> Regards

>

> Jordan