Download it from https://addons.mozilla.org/en-US/firefox/addon/5369 ... https://addons.mozilla.org/en-US/firefox/downloads/file/17827/yslow-0.7.0-fx.xpi...
When I run YSlow, it gives me a message at the top which says "WARNING: For a full analysis you need to loosen Firefox's security settings. Go to about:config...
I downloaded and installed Firebug, restarted Firefox, then downloaded and installed YSlow. When I open Firebug, there's no performance tab or any thing that...
I saw YSlow at Web 2.0 and we've been waiting eagerly for it to come out (and the book to come out as well). Thanks for releasing it to the public! Ernest...
Great tool! But since its already integrated into firebug can I take it out of my status bar? I'd rather just click the firebug icon (or F12) and then click...
We've gotten feedback that people don't want to see any of this info in the statusbar. We'll add an option to hide the statusbar info in the next release. ...
YSlow will consider a script to be out of head section, if it is anywhere after the <body> element in the document. Did you take the script out of head and add...
I'm not sure about the actual rule but I understand the logic behind the grade. Click on the category itself and Yslow explains to you why setting ETag *could...
Yeah, ETags are new to me and we're looking into it here at NI too... It appears that our Netscaler load balancer may be inserting ETags for us which would...
Well, they should be removed if they are actually coming from individual servers in a cluster, right? If there's something (like a load balancer) making the...
In the interest of general Web site performance discussion, thought I'd share some of our success stories on Web site performance! We're not a super huge site...
Ernest, Your NetScaler is setting ETags (which is basically a unique serial # for version of each object served) to the browser. The value in doing this is...
Gotcha. I wasn't sure whether the Netscaler was being "smart" and deduping etags per cluster or not. I'm going to confirm with support. If it or a similar...
In my experience this isn't something a LB box can solve. People use IP or cookie stickiness to tie a session to a particular origin web server. The Netscaler...
If a page is serving a JavaScript file dynamically and not including a Content-Length header it seems that YSlow takes it as having a size of 0 bytes. You can...
First of all a great tool guys! Thanks. YSlow complains about objects that "do not have a far future Expires header". Eg. our brochure site at www.fry-it.com ...
Hi, Rule 4 of the 13 performance rules talks about gzip'ing components, but there are a few browsers that have problems with gzip'ed js/css. I did some...
... but ... some that ... our ... Nick, I think it's better to address your question by looking at what most users are browsing with. IMHO, the benefit that a...
Hi Scott, Compressing images using gzip has been noted throughout the internet as a waste of CPU cycles on both ends as a lot of the gif, jpg and png don't ...
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