Performance
Satori runs on WebKit, the engine macOS already includes. It puts idle tabs to sleep, which frees their memory for the page you are reading.
In a new tab, Satori starts loading the page it suggests from your history, before you press Return. When you do, the page is already on its way. Pointing at a link opens a connection to that site early, without loading the page.
A tab you have not used for half an hour goes to sleep and gives its memory back. On the battery or in Low Power Mode it takes ten minutes. Its icon dims and a moon appears in the tab row or the sidebar. Free memory that looks low does not trigger it, since macOS lends free memory to caches. A tab goes to sleep sooner only when macOS itself says memory is short.
Keep Awake, in a tab's menu, keeps that tab awake. Pinned tabs stay awake already. An idle tab that holds music or a film paused stays awake for up to four hours, and a low-memory warning leaves it alone. Critical memory still puts it to sleep.
The last session comes back as Satori starts. Each restored tab waits, and its web view is built only when you switch to it.
6MB
to download, the whole app
12MB
on your Mac once installed
95
ads and trackers stopped on ten busy sites
The blocker also stops scripts that do nothing for the reader, such as session recording and A/B tests. On CNN, Lenta and Allrecipes, the number of scripts roughly halved and pages finished loading two to three times sooner. These are the sites measured in the 0.8.7 release.
When Soundscapes are off, or faded out, their sound engine stops.
Satori has no battery setting and reports no battery figure. It cuts the work an idle browser does in the background instead. Tabs you have not used for half an hour sleep, or ten minutes on the battery and in Low Power Mode, and a tab out of sight gets fewer timers, since WebKit slows them. Page helpers stand down while their tab is hidden.
Satori.dmg is about 6 MB.
Each tab is its own WebKit view, and WebKit runs pages in separate content processes, as in Safari.
Open Settings › Tabs. The switch is called Sleep tabs you do not use.
Open the tab's menu and choose Keep Awake. Pinned tabs stay awake already.
Open Settings › Privacy & Security and find Connect ahead on hover. It takes effect on the next page.
| Claim |  | Chrome |
|---|---|---|
| Engine that draws web pages | WebKit, the engine Safari uses | Blink |
| Runs web pages in separate processes | Each tab is its own WebKit view, and WebKit runs pages in separate content processes | In general, each new tab or window opens in a new process, says the Chromium design document |
| Puts idle tabs to sleep | After half an hour (ten minutes on the battery or in Low Power Mode), or four hours with paused media. Settings › Tabs has a switch for it | Memory Saver, a setting that deactivates tabs you are not using |
| Runs on | macOS 15 or later, Apple Silicon Macs only | macOS 13 Ventura or later |
Sources: WebKit (webkit.org), Chromium (chromium.org), Chrome Help (support.google.com/chrome), Chrome Enterprise Help (support.google.com/chrome/a). Checked on November 2, 2026. Chrome details change with Chrome versions, regions and settings. Satori and Chrome are compared by documented features, not by speed.
Idle tabs sleep after half an hour, or ten minutes on the battery, and give their memory back. Pinned tabs and tabs set to Keep Awake stay awake.
Its icon dims and a moon appears. When you switch to it, the page loads again.
Not for up to four hours after you last looked at it, if it holds music or a film paused. A low-memory warning leaves it alone too. Critical memory can still put it to sleep.
Satori has no battery setting. It cuts idle work instead: idle tabs sleep after half an hour (ten minutes on the battery or in Low Power Mode), and a tab out of sight gets fewer timers. Satori does not publish a battery figure.
It is the engine macOS already includes, and the same one Safari uses. Satori does not ship its own browser engine.
Open the disk image, drag Satori into Applications, and launch it.
Download Satori for MacSend to my Mac
Free. Requires macOS 15 or later on an Apple Silicon Mac.