OutlyerNet

Firefox is generally a great browser, specially with the right set of extensions, but some of the UI simplifications can be a real PITA for advanced users. Misbehavior can usually be corrected by some obscure variable (often with even obscurer possibles values) in the configuration, the "only" problem is finding it, here are the tweaks I usually do to new installations. (They can be applied most easily by opening the about:config url).

Of course there aren't good values for everyone, otherwise Firefox would be using them.

Simpler acceptance of self-signed certificates

(This one is a real nag in Firefox 3 if you have some LAN services using SSL!)

browser.xul.error_pages.expert_bad_cert = true

Enables inline accept button in the error page.

browser.ssl_override_behavior = 2

Pre-fetch the certificate (two-click acceptance instead of four).

Disable auto image resizing

browser.enable_automatic_image_resizing = false

Always display the tab bar (even with no tabs)

I use this mainly because it keeps the browsing area always with the same size.

browser.tabs.autoHide = false

Enable color profiles

Specially useful when dealing often with photos. Applies embedded color profiles to images if they contain one.

gfx.color_management.enabled = true

Source: Jeffrey Friedl's blog

I'll update this post whenever I find some other obscure option .

Last edit: June 19th 2009