3 ms·

I don't use a Mac, but it's a known issue with the high-resolution ones. I believe it doesn't use the OS compositor, so it ends up redrawing too much. https://

I don't use a Mac, but it's a known issue with the high-resolution ones. I believe it doesn't use the OS compositor, so it ends up redrawing too much. https://bugzilla.mozilla.org/show_bug.cgi?id=1404042 https://bugzilla.mozilla.org/show_bug.cgi?id=1404042 https://bugzilla.mozilla.org/show_bug.cgi?id=1191965 https://bugzilla.mozilla.org/show_bug.cgi?id=1191965

spiralganglion 8y ago
I've used a few retina Macs to do various kinds of web dev. Firefox tends to do some things fastest (eg: re-layout when resizing the window), some things the slowest (eg: certain large, complex CSS animations). For most things, it's perceptually equivalent to Chrome or Safari. Some things that are fast/good in Chrome will be slow/bad in FF, and vice versa. The biggest shortcomings I currently face are (1) a lot of banding when layering lots of complex gradients, due to a poor job of dithering and (2) weird handling of certain colors on my P3 display due to the assumption that colors are in the full display space rather than sRGB.
- lou1306 8y ago
  A big problem of early Quantum Firefox on HiDPI Macs was its high battery usage. I think it got slightly better with later releases, but I don't have data to support that.
  - acdha 8y ago
    For people running in non-default scaled resolutions. In the default configuration it's somewhere in between Safari (best) and Chrome (worst).
    - spiralganglion 8y ago
      Unfortunately, a non-native scaling mode is the default on new Mac laptops now. You need to switch to one of the custom scaling modes to get a true, native 2x.
      - acdha 8y ago
        I've heard this but haven't seen it on any new hardware — I thought it was limited to 2016 or so.
    - tssva 8y ago
      I have never run my MacBook Pro in anything but the default scaling resolution. Quantum has been and continues to be a nightmare on my device. Unusably slow performance with high CPU utilization and occasionally spiking CPU utilization to 100% for prolonged periods. Usually long enough that I am forced to reboot the laptop.

spiralganglion 8y ago

I've used a few retina Macs to do various kinds of web dev. Firefox tends to do some things fastest (eg: re-layout when resizing the window), some things the slowest (eg: certain large, complex CSS animations). For most things, it's perceptually equivalent to Chrome or Safari. Some things that are fast/good in Chrome will be slow/bad in FF, and vice versa. The biggest shortcomings I currently face are (1) a lot of banding when layering lots of complex gradients, due to a poor job of dithering and (2) weird handling of certain colors on my P3 display due to the assumption that colors are in the full display space rather than sRGB.

lou1306 8y ago
A big problem of early Quantum Firefox on HiDPI Macs was its high battery usage. I think it got slightly better with later releases, but I don't have data to support that.
- acdha 8y ago
  For people running in non-default scaled resolutions. In the default configuration it's somewhere in between Safari (best) and Chrome (worst).
  - spiralganglion 8y ago
    Unfortunately, a non-native scaling mode is the default on new Mac laptops now. You need to switch to one of the custom scaling modes to get a true, native 2x.
    - acdha 8y ago
      I've heard this but haven't seen it on any new hardware — I thought it was limited to 2016 or so.
  - tssva 8y ago
    I have never run my MacBook Pro in anything but the default scaling resolution. Quantum has been and continues to be a nightmare on my device. Unusably slow performance with high CPU utilization and occasionally spiking CPU utilization to 100% for prolonged periods. Usually long enough that I am forced to reboot the laptop.