about:config
Cache
browser.cache.check_doc_frequency - "1"
0 - Check for a new version of a page once per session 
      (a session starts when the first application window opens and ends when the last application window closes).
1 - Check for a new version every time a page is loaded.
2 - Never check for a new version - always load the page from cache.
3 - Check for a new version when the page is out of date. (Default)
Otevírání skupiny záložek v nových panelech
browser.tabs.loadGroup (SeaMonkey) - "0"
browser.tabs.loadFolderAndReplace (Firefox) - "false"
Otevírání linku v novém panelu
browser.link.open_newwindow - "3"
browser.link.open_newwindow.restriction - "0"
Divert all window.open calls according to how browser.link.opennewwindow is set
   (i.e., into new tabs if it's 3, new windows if it's 2, or the current tab/window if it's 1). 
   (Default in Firefox 1.0.x and SeaMonkey)
k tabom/panelom v FF:
Browser.tabs.closeButtons - "3"
0 - Display a close button on the active tab only
1 - Display close buttons on all tabs (Default)
2 - Don’t display any close buttons
3 - Display a single close button at the end of the tab strip (Firefox 1.x behavior)
   -> dvojklik pravym na listu otvori novy tab,
   -> prisposobenie panelov ma za nasledok button "nova karta", ktora, co je naozaj zvlastne otvori novy tab,
   -> stredne koliesko otvori odkaz v novom tabe,
   -> taby sa daju zavriet kliknutim stredneho krysitka /kolieska/
   -> extension "firefox showcase" - nahlady tabov /v bocnej liste, v novom okne, v novom tabe/
Minimální šířka panelu na liště (víc se jich vejde)
browser.tabs.tabMinWidth - "50" (Default "100")