Eh, just been dinking around with this wee thing. Depending on your orientation it could be a bit of a timesaver or a bit of a timewaster.
Oh, and found this as well.
Web Developer toolbar
I use both and have been using both pretty much ever since I've been using Mozilla.
I use the following extensions in the Mozilla Suite:
With the toolbar, the only thing I really use a lot is the resizing to 800x600. Being on an intranet site, I have to manually run my pages against the validators. Plus, some things seem a little buggy. The "View Source" button seems to choke a little bit before bringing up the source, so it's almost a waste of time to use that. Of course, maybe that's just my experience with it.
Originally posted by LordShryku
With the toolbar, the only thing I really use a lot is the resizing to 800x600. Being on an intranet site, I have to manually run my pages against the validators. Plus, some things seem a little buggy. The "View Source" button seems to choke a little bit before bringing up the source, so it's almost a waste of time to use that. Of course, maybe that's just my experience with it.
Have you flipped the 'view source' toggle in the Web Dev toolbar options? Unchecking it loads a new window from memory, which is usually fast, checked it loads it in a new tab, but reloads the page, IIRC.
Originally posted by LordShryku
With the toolbar, the only thing I really use a lot is the resizing to 800x600. Being on an intranet site, I have to manually run my pages against the validators. Plus, some things seem a little buggy. The "View Source" button seems to choke a little bit before bringing up the source, so it's almost a waste of time to use that. Of course, maybe that's just my experience with it.
Also look into the "validate local CSS or HTML", it autosubmits the cached version of whatever you're looking at to the validator 
I don't leave home without it. Well, you know what I mean.
The developer toolbar always kind of mystified me as to it's usefulness - I've actually never been able to get it to work but maybe I should try updating Mozilla...
Weedie also mentions Adblock. I use it in Safari (it's just a stylesheet) and it probably knocks about 80% of the ads out of things. I've noticed that recently the PHPBuilder site has worked its way around AdBlock but it's AOK in my book.
Originally posted by vaaaska
Weedie also mentions Adblock. I use it in Safari (it's just a stylesheet) and it probably knocks about 80% of the ads out of things.
What I like about it is that not only can it hide the ads, but it can block the actual client request. When I'm on a dialup connection, the difference is noticeable (especially when you consider how busy some adservers are, and how slow they can be).
That webdeveloper toolbar has saved me probably depending on a project a couple of hours or so. especially debugging CSS and making sure its valid
That local html and css thing gets a real workout. The only bad thing is the WAI, 508 Accessibility only being able to check it once like every 1min or so.. I usually edit then have to wait thats one thing i dont like but its not the Extensions fault all of the WAI, 508s do it :mad:
Other than the Adblock extension its probably the most used extension i use
Multiscroll gives me the power of Autoscroll à la IE. That's what I love about it.
I find the forms functions of Web Developer really good. But since I use the suite I don't have the CSS Editing function...that's coming in the next release I believe.
Well with the web developer toolbar you can already edit css in v0.8 
Originally posted by planetsim
Well with the web developer toolbar you can already edit css in v0.8
That's because you're using Firefox. I'm using the suite.
Originally posted by Merve
That's because you're using Firefox. I'm using the suite.
Well yea i thought it was the same with the suite, then again i dont use it.