Take a look at this.

Thanx Nathan but I could not identify the appropriate entry to delete. Maybe you can. I dont want to make a serious mistake. Here is some my prefs file in notepad:

1. Mozilla User Preferences

/* Do not edit this file.

*
* If you make changes to this file while the application is running,
* the changes will be overwritten when the application exits.
*
* To make a manual change to preferences, you can visit the URL about:config
* For more information, see http://www.mozilla.org/unix/customizing.html#prefs
*/

user_pref("accessibility.typeaheadfind.flashBar", 0); user_pref("app.update.auto", false); user_pref("app.update.disable_button.showUpdateHistory", false); user_pref("app.update.lastUpdateTime.addon-background-update-timer", 1308598989); user_pref("app.update.lastUpdateTime.background-update-timer", 1308599230); user_pref("app.update.lastUpdateTime.blocklist-background-update-timer", 1308599110); user_pref("app.update.lastUpdateTime.microsummary-generator-update-timer", 1308098630); user_pref("app.update.lastUpdateTime.places-maintenance-timer", 1305161854); user_pref("app.update.lastUpdateTime.search-engine-update-timer", 1308596001); user_pref("browser.cache.disk.capacity", 1048576); user_pref("browser.cache.disk.smart_size.first_run", false); user_pref("browser.cache.disk.smart_size_cached_value", 819200); user_pref("browser.download.lastDir", "C:\\Documents and Settings\\bobo\\My Documents\\My Pictures\\All sizes The Philbrook Museum Flickr - Photo Sharing!_files"); user_pref("browser.download.manager.alertOnEXEOpen", true); user_pref("browser.download.save_converter_index", 0); user_pref("browser.feeds.handler.default", "web"); user_pref("browser.feeds.handlers.webservice", "http://add.my.yahoo.com/rss?url=%s"); user_pref("browser.feeds.showFirstRunUI", false); user_pref("browser.formfill.enable", false); user_pref("browser.history_expire_days.mirror", 180); user_pref("browser.migration.version", 5); user_pref("browser.offline", false); user_pref("browser.places.importBookmarksHTML", false); user_pref("browser.places.smartBookmarksVersion", 2); user_pref("browser.preferences.advanced.selectedTabIndex", 0); user_pref("browser.rights.3.shown", true); user_pref("browser.search.useDBForOrder", true); user_pref("browser.shell.checkDefaultBrowser", false); user_pref("browser.startup.homepage", "http://talkstreamlive.com"); user_pref("browser.startup.homepage_override.buildID", "20110413222027"); user_pref("browser.startup.homepage_override.mstone", "rv:2.0.1"); user_pref("browser.startup.page", 3); user_pref("devtools.hud.display.filter", false); user_pref("devtools.hud.display.filter.csserror", true); user_pref("devtools.hud.display.filter.cssparser", true); user_pref("devtools.hud.display.filter.error", true); user_pref("devtools.hud.display.filter.exception", true); user_pref("devtools.hud.display.filter.global", false); user_pref("devtools.hud.display.filter.info", true); user_pref("devtools.hud.display.filter.jswarn", true); user_pref("devtools.hud.display.filter.log", true); user_pref("devtools.hud.display.filter.network", true); user_pref("devtools.hud.display.filter.networkinfo", true); user_pref("devtools.hud.display.filter.warn", true); user_pref("devtools.hud.height", 211); user_pref("dom.disable_open_during_load", false); user_pref("dom.ipc.plugins.enabled.npietab2.dll", true); user_pref("dom.max_chrome_script_run_time", 0); user_pref("dom.max_script_run_time", 1800);

Hmm, I don't think you need an edit. Try reading this.

No pref.js file. but I tried to open prefs file but I get an error box. Code 800AO3F6.

BTW- all my settings/prefs work just fine.