This has to be the most impressive development plugin for Firefox yet. It's great for just trimming down pages and isolating portions to print as well.

http://www.karmatics.com/aardvark/

Firebug, Greasemonkey, Stylish, Web Developer, IETab, Quick Java, Mile Wide Back, CustomizeGoogle, DownThemAll, Adblock Plus, and NoScript

If you've made a typo on a URL and you're forever being reminded of it when FF tries to help you make matches against what you're typing, you can remove them. Just down-arrow through the list and press Shift+Delete on each entry you want to drop.

To view your cache, point your browser at about:cache.

Like you, I love Firefox for many reasons, including its popup blocking support. It turns out that some clever people figured out that you could launch popups from Flash, getting around the Firefox default settings.

Fortunately, you can get around it:

1. Type about:config into the Firefox location bar.
2. Right-click on the page and select New and then Integer.
3. Name it privacy.popups.disable_from_plugins
4. Set the value to 2.

The possible values are:

0: Allow all popups from plugins.
1: Allow popups, but limit them to dom.popup_maximum.
2: Block popups from plugins.
3: Block popups from plugins, even on whitelisted sites.

Note: Borrowed from http://www.petebevin.com. Read the original article.

You can use RSS feeds to create live bookmark menus in Firefox. Using the menus, go to Bookmarks -> Manage Bookmarks -> File -> New Live Bookmark. Enter RSS feed information. In your bookmarks menu you'll have a directory-like listing of the RSS information.

This is a great page for tips:

http://www.mozilla.org/support/firefox/tips

Pressing C-l will ask you for the line number you wish to view and will jump you to it and highlight it for you.

You need to restart Firefox for the modifications of hosts file to take effect (if you edited the hosts file while Firefox had been already opened).

If you want to start up multiple pages in Firefox, put a string like this in your start URL under Tools -> Options:

http://www.google.com/|http://www.slashdot.org/

Open about:config in a new tab and make the following changes:

network.http.pipelining -> True
network.http.pipelining.maxrequests -> 10

Anywhere on the screen, right-click and add a new integer:

nglayout.initialpaint.delay -> 0

If you're using a proxy, also change the proxy versions:

network.http.pipelining.proxy.pipelining -> True

WARNING: Be conservative when setting your pipelining settings. To the untrained eye this feature looks like a DOS attempt on the server side and might get you blocked.

You can quickly page through tabs in Firefox by pressing Cntrl+Tab

For more control, use Cntrl+Page Up to go forward a tab or Cntrl+Page Down to go back one.

Here's a list of great Firefox extensions:

• Firebug
• Greasemonkey
• Stylish
• Web Developer
• IE Tab
• QuickJava
• MileWideBack
• CustomizeGoogle
• DownThemAll
• Adblock Plus
• NoScript

Enjoy!