Ubuntu should check which extensions are not compatible with a new version of Firefox before updating Firefox. FIrefox disables incompatible extensions when it is updated. For some users it is more important to be running a particular extension than to be running the latest greatest Firefox. The user should be warned that any particular extension may not work in the new version, and be given an option whether or not to upgrade Firefox.

Firefox, as all programs that are run from the user account can access, alter and destroy all files that belong to that user.

While browsing, firefox can come across all kinds of mallicious websites, trying to destroy all your files. It's only a matter of time until some website succeeds.

Many new users of Ubuntu have either used Windows before or are planning to use a dual boot system. Most of them have or had a working internet connection.
One major problem for a new user is to get internet access up and running in Ubuntu, and help is more difficult to get without internet access.
To configure a USB modem correctly, you need to get the ATM parameters right (VPI and VCI numbers) and put them into a script. This procedure is described here:
http://www.linux-usb.org/SpeedTouch/ubuntu/index.html
It is possible to find the needed information on VCI and VPI in the windows registry as described here:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/236265.html
Wouldn't it be nice to have the whole procedure packaged into a script asking you just for your internet username and password?

Binary package hint: firefox

Use https://encrypted.google.com/ in searches

Always.. i put bug wishlist https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/683987

When browsing the Internet or getting help on the Ubuntu Servers in XChat, I usually stumble over commands that will be run in Terminal. I want a "Run in Terminal" right-click option in Firefox (maybe other places too).

Swfdec and Gnash are free software flash players which work on Ubuntu. When using these, for example browsing YouTube, the "page loaded" progress bar fills up even though the bulk of the page (ie. the video) hasn't downloaded yet.

It is a small issue, but would be nice to fix.

I do not know a lot about fonts, but I do know that a lot of websites in Firefox seem to have horrible text compared to viewing the same site in Firefox on windows. I feel that a lot of attention and effort should be put into a cosmetic problem like this because web browsing should make new users feel like they are dealing with a familiar application; weird rendering is a big step backwards.

The one website which seems to exemplify this "weird rendering" is http://www.nytimes.com
The spacing seems screwed up and it generally looks quite ugly compared to what it looks like in firefox on windows.

The default setting in about:config should be browser.urlbar.click.selectsall = TRUE (or similar)
This is far more intuitive, since people tend to want to focus a form with a single click, and are unlikely to want to use it in the way it's currently set up.

It would be great to have deskbar index and search firefox bookmarks and history again. Please update the corresponding plugins to make them work with recent Firefox versions.

Firefox should support addbuddy hyperlinks to pidgin