827518 - Lots of unused CSS is served to /firefox/new/ page

Status: NEW

(www.mozilla.org :: Pages & Content, defect, P3)

Description

[Isac Lagerblad (:icaaq)]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:20.0) Gecko/20130107 Firefox/20.0
Build ID: 20130107030932

Steps to reproduce:

1. When using Google chrome type http://www.mozilla.org/en-US/firefox/new/ in the address bar and press Enter
2. Open up the developer tools and run a webpage performance audit under the Audits tab.


Actual results:

~27% (17KB) of the CSS served to the user it not used.


Expected results:

Because of the high traffic on this page, a more optimized version of the CSS should be sent to the user. This will improve performance for the user and save bandwidth for mozilla.

Comment 1

[Chris More [:cmore]]

(In reply to Isac Lagerblad (:icaaq) from comment #0)
> User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:20.0)
> Gecko/20130107 Firefox/20.0
> Build ID: 20130107030932
> 
> Steps to reproduce:
> 
> 1. When using Google chrome type http://www.mozilla.org/en-US/firefox/new/
> in the address bar and press Enter
> 2. Open up the developer tools and run a webpage performance audit under the
> Audits tab.
> 
> 
> Actual results:
> 
> ~27% (17KB) of the CSS served to the user it not used.
> 
> 
> Expected results:
> 
> Because of the high traffic on this page, a more optimized version of the
> CSS should be sent to the user. This will improve performance for the user
> and save bandwidth for mozilla.

The /firefox/new/ page will go away in the next few weeks once new-b replaces it.

Comment 2

[Isac Lagerblad (:icaaq)]

(In reply to Chris More [:cmore] from comment #1)

> The /firefox/new/ page will go away in the next few weeks once new-b
> replaces it.

On /new-b/ there is 16.47KB (25%) of unused CSS. Not a big deal on regular sites but I think this page is special. I have a strong feeling that a typical user for this page just visits this specific page (hit and run) and does not visit any other pages on mozilla.org. (just speculating though)

Comment 3

[Chris More [:cmore]]

(In reply to Isac Lagerblad (:icaaq) from comment #2)
> (In reply to Chris More [:cmore] from comment #1)
> 
> > The /firefox/new/ page will go away in the next few weeks once new-b
> > replaces it.
> 
> On /new-b/ there is 16.47KB (25%) of unused CSS. Not a big deal on regular
> sites but I think this page is special. I have a strong feeling that a
> typical user for this page just visits this specific page (hit and run) and
> does not visit any other pages on mozilla.org. (just speculating though)

+1 to that. On pages where speed and conversions are the number one priority, anything unused should be minimized or removed. We should continuously improve important pages like the new-b page and others. Let's keep this open to evaluate new-b and specifically what can be removed.

Comment 4

[Jennifer Bertsch [:jbertsch]]

Cmore:  what do you want to do with this one?  Close?  Create a task on the mozilla.org kanbanery board backlog?

Comment 5

[Chris More [:cmore]]

:icaaq: Can you do a pull request to simply the CSS and remove the unused elements?

jbertsch: I think this is worthwhile because the smaller and quicker the page, the better for conversions.

Comment 6

[Isac Lagerblad (:icaaq)]

cmore: yes. will have a look at it today.

Comment 7

[Chris More [:cmore]]

(In reply to Isac Lagerblad (:icaaq) from comment #6)
> cmore: yes. will have a look at it today.

ok, cool. Thanks!!