Programs » Firefox

Tweaks for ‘about:config’

1. Performance

Disable the session restore on crash

browser.sessionstore.resume_from_crash -> false

Reduce memory usage by reducing images store time in the memory

image.mem.min_discard_timeout_ms -> < 10000

Images cache maximum capacity

browser.cache.memory.capacity -> ~5000 (KB)

Max pages to store in memory for Back/Forward buttons

browser.sessionhistory.max_total_viewers -> 3

Disable/enable image loading

permissions.default.image -> [0]: always; [1]: never; [2]: don't load third party images

2. Interface

Turn off the “Downloads Complete” alert -> false

Close multiple tabs without warning

browser.tabs.warnOnCloseOtherTabs -> false

Show separate Downloads window [F29+]

If not working use the Downloads Window extension

Classic search bar [F29+] -> false

Disable tabs animation on open/close [F29+]

browser.tabs.animate -> false

Disable Close button in tab

browser.tabs.closebuttons -> false

For Firefox 29+ use “No Close Buttons” extension

3. Selection

Change selection background color in hex format (#000000, #a1cef2)

Normal text background


Found text background


Inactive window found text background


Text color


Other colors


3. Miscellaneous

Disable addons install delay

security.dialog_enable_delay -> 0

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