Fewer processes
Instead of one process per site, only signed-in and high-value sites get their own. Same tabs: 12 processes, 36 in Zen.
12 / 36 processesNexBrowser / Zen, same tabs
Same tabs.
Less memory.
NexBrowser keeps Zen's calm interface, runs fewer processes in the background, puts idle tabs to sleep on its own and locks every account with its own password.
Coming soon for LinuxSee the benchmark
12 / 36NexBrowser / Zen, same tabs
596 MBLet the tabs sit idle.
Same 8 tabs
60 s
Open 8 tabs, wait a minute.
Empty profile, the same 8 sites. NexBrowser runs 12 processes, Zen runs 36.
+150 s
Let the tabs sit idle.
Background tabs go to sleep and give their memory back. In Zen the picture barely changes.
Result
63% less memory than Zen.
For this test the sleep timer was lowered from 20 minutes to 1 minute. By default, tabs sleep after 20 minutes.
NexBrowser
596MB
8 processes
Zen
1,629MB
35 processes
60 s after launch, median of 3 runs. Details on the Memory page.
Where the difference comes from
Memory should go to what you keep open.
Tab sleep
Background tabs left alone for 20 minutes are unloaded and reload where you left off when you click them. Tabs playing audio, pinned tabs and tabs in a call never sleep.
20 minuntil a background tab sleeps
Right-sized caches
The back/forward cache and the decoded image cache are capped, and prefetching the next page is off.
512 MBimage cache cap (was 2 GB)
Accounts
01
Pick your account
The account list appears at launch. Create new accounts and change their name, avatar and theme.
02
Enter your password
For a locked account no browser window opens before the password is entered. Cancel and NexBrowser quits.
03
Pick up where you left off
Your tabs, workspaces and sessions are waiting. Other accounts' data is not visible.
From Zen
The interface you know is still there.
Vertical tabs
Tabs live in the sidebar with readable titles.
Workspaces
Keep work, school and personal tabs apart.
Split view
Open two pages side by side without switching tabs.
Firefox protections
Tracker blocking and safe browsing from the Firefox engine.
NexBrowser is coming to Linux.
When the first release is ready, the download link will be published on the Download page.
Coming soon for LinuxDownload page