Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Is it better to keep opening new tabs in the same browser session or is there a point where opening another browser session (instance) is 'better' (performance, system resources, stability, etc)?

more options

This is a general question about the best way to operate with many open web sites. Sometimes I have 10-20 open at once. Sometimes I will open a second or third copy of the browser and have multiple tabs there too.

This is a general question about the best way to operate with many open web sites. Sometimes I have 10-20 open at once. Sometimes I will open a second or third copy of the browser and have multiple tabs there too.

Chosen solution

Some other browsers use a separate process for each window that is opened, Firefox doesn't. Regardless of how many windows you have open in Firefox, you're only running one "session" or Firefox process.

The only exception to that is with Firefox 3.6.4 & up versions some plugins will run in a separate "plugin-container.exe" process.

Read this answer in context 👍 2

All Replies (1)

more options

Chosen Solution

Some other browsers use a separate process for each window that is opened, Firefox doesn't. Regardless of how many windows you have open in Firefox, you're only running one "session" or Firefox process.

The only exception to that is with Firefox 3.6.4 & up versions some plugins will run in a separate "plugin-container.exe" process.