Pipelining
Set network.http.pipelining to True
Set network.http.proxy.pipelining to True
Set network.http.pipelining.maxrequests to something like 30
Start Rendering Pages Faster
Create new integer and name it nglayout.initialpaint.delay and set its value to 0
Paste Multiple Lines as a Single Line
Set editor.singleLine.pasteNewlines value to 2
Limit RAM Usage to 10MB When Minimized
Create new boolean and name it config.trim_on_minimize and set value to True
Stop Pre-fetching Links You Don't Click
Set network.prefetch-next value to False
Use Spellcheck In Input Fields as well as Text Areas
Set layout.spellcheckDefault value to 2
Set browser.enable_automatic_image_resizing value to False
Reduce the Number of Reflows
Create new integer and name it content.notify.interval and set the value to 1000000
Create new boolean and name it content.notify.ontimer an select True
Close Button Preferences
Set browser.tabs.closeButtons to any of the following:
0 Display a close button only on the currently active tab
1 Display close buttons on all tabs
2 Don't display any close buttons
3 Display one close button at the end of the tab bar
Set browser.search.openintab value to True
Open Bookmark Groups in New Tabs (Does Not Replace Open Tabs)
Set browser.tabs.loadFolderAndReplace value to False
Squeeze More Tabs Into the Tab Bar
Set browser.tabs.tabMinWidth to however small you want your tabs before overflow
Maximize Connections to Multiple Servers
Set network.http.max-connections to something like 32
Stop Graphics Caching
Set browser.cache.memory.enable value to False
Stop Back/Forward Caching
Set browser.sessionhistory.max_total_viewers value to 0
Change Scrollbar Behavior (Jumps to position when scrollbar is clicked)
Create new boolean and name it ui.scrollToClick and set value to True