Got broken Rated 1 out of 5 stars
Used to be five stars, now its one. It's been broken since Firefox 36, no updates from the developer. So sadness.
YSlow Not working Rated 3 out of 5 stars
I am using Firefox 38.0.1 .... :( Yslow not working !!!
How to get it work Rated 5 out of 5 stars
Use the latest Firefox ESR Version. I used Firefox ESR 31.6.0 for Mac OSX.
Install the Firebug 1.12.8 Addon.
Install the YSlow 3.1.8 Addon.
Open the Firebug Extension and from there you can use YSlow.
PS: Ich you will have 2 different Firefox versions on the Mac, just rename the Firefox program to "Firefox 37" or a similar name. Than you can install the ESR Version and rename it to Firefox ESR. After that you can rename "Firefox 37" back to Firefox or whatever you want. Both Firefox programs will share bookmarks and so on. YSlow will only work with the Firefox ESR version.
Stopped working on later versions Rated 1 out of 5 stars
such a great addon cannot have been ignored for so long now by the devs (it's been almost a year since it stopped working properly) - most importantly, rulesets, help, and most important of all... printable view don't work. please fix this otherwise brilliant addon.
one star until it's working again, unfortunately, otherwise i'd give it five.
Call for help
Since most of you missing YSlow on FF are very likely to be a developer who cares about YSlow + Firefox + Firebug. I kindly call for your help. It's been years since I'm not following FF nor FB development. Chances are some change on their end broke YSlow. If only one of you could spend some time investigating I'd be more than happy to merge a PR on Github and push to Mozilla. Thanks.
Rated 1 out of 5 stars
This does not work on Firefox at the moment. None of the buttons are clickable.
Not working on Firefox 37.0.1 Rated 1 out of 5 stars
Does not work on Firefox 37.0.1
The best addon, but why it doesn't work? Rated 5 out of 5 stars
It is much more better then google's page speed on chrome, so please improve it's work with latest firefox!
Will take a look tonight.
Although I'm swamped, I'll try to take a look tonight. It might take some time since it's been a while I'm not developing for Firefox.
Doesen't work on Fire Fox Rated 1 out of 5 stars
I have the same problem as behnampmdg3. What's the solution?
Doesn't work on Fire Fox Rated 1 out of 5 stars
Doesn't work on Firefox for me.
Can anyone help?
None of Yslow panel buttons are clickable!
Good Job Rated 5 out of 5 stars
Good Job. Development next time
Rated 4 out of 5 stars
Yslow is definitely great! I can check my website performance and see if everything is working perfectly. However, sometimes it does run a little slow, but nonetheless, it's awesome!
Both perfect and useless Rated 5 out of 5 stars
YSlow is one of the best tools for web developers ever - it is so much helpful to improve any site by improving access speed and minimizing broadband waste.
However, since Firefox updated itself to version 29, YSlow is completely useless. That is because the only way to access YSlow was through an icon in the add-ons bar, and now this bar does no longer exist.
The same problem happens with some other add-ons, but then you get help if you click on the menu item "Customize" or press F10 to get the menu bar.
-Customize provides you with some of the missing add-on icons, so you can add them either to the address bar or to the bookmarks bar - but then, the YSlow icon is not available.
-The menu bar helps you. But not through the "View - Toolbars" menu, which has the add-ons bar missing so user cannot even opt in to have it, but rather because at the tools menu there usually is some alternative access to the add-ons - but then, the YSlow menu item is not available.
Show correct results, but print function is not working Rated 3 out of 5 stars
I wanted the print report of YSlow results but Print functionality is not working in latest Mozilla as on 19 Apr 2014
Did Not Give Information about Slow Pages Rated 1 out of 5 stars
I would not give it even 1 star because i installed it with firebug and it did not give me info about why my pages are slow .
Doesn't work: FF 27 Rated 1 out of 5 stars
Clicking "Run YSlow" does nothing on 27.0.1. No documentation telling you how to access it (unlike Chrome version), so if you don't know about the Addons bar, you're SOL.
Rated 2 out of 5 stars
Doesn't really seem to work with many (any?) web sites and latest firefox. Requires a bookmark hack to get running and hasn't been updated for around 2 years.
Rated 5 out of 5 stars
Yes, it help my task to find or identify what is not working properly during loading my site.
Rated 3 out of 5 stars
Works, but could be better
Rated 3 out of 5 stars
Fx 26 works .. is it interesting but I waited more .. 3stars
NOT WORKING Rated 1 out of 5 stars
Sorry but since Firefox 18 on WIN 7 or so it's NOT WORKING.
Now i have FireFox 24 and Firebug installed on WIN 7 and it's still not working.
This Issue was posted on the developersite a few times also but NO RESPONSE from the developers. :-(((