FireFox about:config

firefox-config.properties

# tracking protection
privacy.trackingprotection.enabled=true

# default search engine
browser.search.defaultenginename=DuckDuckGo

# no delay when installing plugins
security.dialog_enable_delay=0

# increase weight of bookmarks in awesomebar
places.frecency.unvisitedBookmarkBonus=200

# remove bookmarks from awesomebar
places.frecency.unvisitedBookmarkBonus=0

# disable plugin compatibility check
extensions.checkCompatibility=false

# new tab number of tiles
browser.newtabpage.rows=3
browser.newtabpage.columns=3