Browsers & devices

The desktop browsers and emulated phones and tablets – as well as default connection bandwidths – available in your Synthetic settings

Desktop browsers

SpeedCurve provides the following desktop browsers to test with:

  • Chrome
  • Firefox
  • Internet Explorer 11

Our default desktop test profiles use a viewport size of 1280x800 with a pixel ratio of 1.0. They use the "cable" network setting, and don't apply any CPU throttling.

We update our browser versions during a scheduled test agent update every 3 months. You can see the browser version that was used to run a test at the top of each test result page :


Emulated phones & tablets

We provide preconfigured emulated phones and tablets. You can also build your own custom browsers and control settings like viewport size, device pixel ratio, connection speed, and even packet loss.

Below are the default emulated phones and tablets, along with their network speed and viewport settings. Most of the devices use emulated CPU throttling.

DeviceNetworkViewport SizeDisplay DensityCPU Slow Down Factor
Apple iPadWiFi768x10242X1.8
Apple iPhone 5Mobile 3G320x5682X3
Apple iPhone 6Mobile 3G375x6272X2.6
Apple iPhone 7Mobile 4G375x6672X1.2
Apple iPhone 8Mobile 4G LTE375x6672X0
Apple iPhone XMobile 4G LTE375x8123X0
Google Nexus 6Mobile 3G412x6593.5X2.9
Google Nexus 7Mobile 3G600x9602X3.1
Google Nexus 10Mobile 3G800x12802X3
Google PixelMobile 4G411x7312.6X2.4
Google Pixel 2Mobile 4G LTE411x7312.6X2.2
Samsung Galaxy S IIIMobile 3G360x6402X3.2
Samsung Galaxy S4Mobile 3G360x6403X3.1
Samsung Galaxy S7Mobile 4G360x6403X2.3
Samsung Galaxy S8Mobile 4G LTE360x7404X2.2

Connection bandwidth

The connection for our tests is throttled to emulate the average bandwidth of users. When adding a Custom Browser you can adjust the connection speed to emulate slower mobile or faster fiber connections.

  • Fiber
    Download: 19.5 Mbps
    Upload: 4.9 Mbps
    Latency: 4ms

  • Cable/WiFi
    Download: 5 Mbps
    Upload: 1 Mbps
    Latency: 28ms

  • Mobile 3G
    Download: 1.6 Mbps
    Upload: 0.8 Mbps
    Latency: 300ms

  • Mobile 4G
    Download: 9 Mbps
    Upload: 9 Mbps
    Latency: 170ms

  • Mobile 4G LTE
    Download: 12 Mbps
    Upload: 12 Mbps
    Latency: 70ms