This version reached its end-of-life on October 5, 2021.
| Preference | Value | Why | | :--- | :--- | :--- | | browser.sessionhistory.max_entries | 5 | Reduces RAM usage from back/forward cache | | layers.acceleration.disabled | true | Fixes graphical glitches on Intel GMA 950/X3100 | | gfx.compositor.glcontext.opaque | true | Reduces UI stutter | | javascript.options.jit.content | false | Sacrifices speed for stability on older CPUs (Core 2 Duo) | | network.http.max-persistent-connections-per-server | 6 | Faster page loads on slow Wi-Fi |
If you are still on 10.11.6, Safari 11.1.2 is your default browser. It’s a relic. Here’s why switching to is a no-brainer:
But wait—there’s a community-driven project called that has backported newer security patches to Firefox 78, keeping El Capitan users safer than Apple itself.
Because Firefox 78 has unpatched holes, layer your defenses:
This version reached its end-of-life on October 5, 2021.
| Preference | Value | Why | | :--- | :--- | :--- | | browser.sessionhistory.max_entries | 5 | Reduces RAM usage from back/forward cache | | layers.acceleration.disabled | true | Fixes graphical glitches on Intel GMA 950/X3100 | | gfx.compositor.glcontext.opaque | true | Reduces UI stutter | | javascript.options.jit.content | false | Sacrifices speed for stability on older CPUs (Core 2 Duo) | | network.http.max-persistent-connections-per-server | 6 | Faster page loads on slow Wi-Fi | Firefox Mac Os 10.11.6
If you are still on 10.11.6, Safari 11.1.2 is your default browser. It’s a relic. Here’s why switching to is a no-brainer: This version reached its end-of-life on October 5, 2021
But wait—there’s a community-driven project called that has backported newer security patches to Firefox 78, keeping El Capitan users safer than Apple itself. Here’s why switching to is a no-brainer: But
Because Firefox 78 has unpatched holes, layer your defenses:
