I was using v28 i think but recently switched PC's and figured i would bite the bullet and update to current version.
i use Chrome too *rarely (auto language translation is good)
but i stick with FF because of my many mod's i have done to it stretching back about a decade.
for one thing i installed a GreaseMonkey script that changes every web page to use a black background.
I also made new tabs opened a blank page with a black background with this.. (inside userContent.css)
@namespace url(http://www.w3.org/1999/xhtml);
/* Background before page loads see userContent.css for about:blank */
tabbrowser tabpanels{
background-color: rgb(000, 000, 000) !important; }
@-moz-document url("about:newtab") {
#newtab-scrollbox{
background-size: 100% !important;
background-color: #000000 !important;
}
}
browser { background-color: #000 !important; }
#browser { background-color: #000 !important; }
#TabsToolbar{ -moz-box-ordinal-group: 100 !important; }
Chrome can load scripts too with out using GreaseMonkey but some scripts don't work (some of mine did not)
The FF search provider feature is cool !
I even added a search provider for the web site that has them all (Mycroft - search providers compatible with Chrome too)
If you guys never heard of Mycroft i highly advise upgrading your web experience now..Mycroft Project: Search Engine Plugins - Firefox IE ChromeBut they (Mozila) ruined the search box functionality with their one click crap system on current builds
There is an addon called ClassicTheme restorer but it has bugs.
I was able to revert all the major stuff that bugged me to older styles. (with out another addon like Classic restorer)
Like the search box can be reverted with an about:config toggle.
I sometimes highlight a file name then right click the selected text and hit Search with
you can't even do that anymore with current versions of FF.
Such as the buttons customization options page.. adding a blank space in there used to be easy now it's gone.
it's all a dumbed down sad ass Google Chrome rip off.
When i updated my address box was like 150 px wide and my search box was about 650 px wide.. screwed up !
so you click on customize and then notice.. ohhh wtf ? they removed the ability to resize those boxs.
BUT WAIT.. a work around some girl posted online..
squeeze both box's so they are right beside each other then exit customize..
then move the mouse over the spot in between the two box's and it adjusts the ratio of box sizes 
Then you can go back into Customize and re-set your buttons..
or you can specify a specific pixels wide option in the userChrome.css file too.
Updated.. my adblock plus toolbar icon was gone had to do googling to learn how to get it back.
i can't live with out it and the element-hider addon.. i mod the sites i got to the most
I already had to get an Addon to restore the old style Downloads window too.
I also use *rarely the addon "DownThemAll" for big resumable links like MS OS's images etc..
I have Flagfox addon too so i can see flags for the sites i visit.
And Locationbar mainly so i can hover over an address (in the box) hold control then tap it to go to the root domain.
Also worth mentioning i have the Password Depot extension.
I also have no java installed and have flash set to run only when i click on it in the page.. per video.
I got the PDF plugin though and Google Updates disabled.
Then i have a GreaseMoneky Script that hides the Google side box preview and puts cache'd links back.
And a script that blocks unsafe windows from opening (prevents most pop-ups)
Then the color script i mentioned earlier and a Piratebay ad-remover script.
Also have thousands of Bookmarks collected for 10+ years grouped in 100's of categories.
My browser pwn's all your crap i bet.. my web surfing is serious business and i need proper browser !!11
Oh yeah and i have Netvibes set up for my Homepage with a bunch of different type of RSS feeds.
Unless your browser looks like this ? Your doing it wrong..
Also been using it for a while now. Plus, all my FF addons work in Pale Moon as well. 
Opera browser is quite cool 
