Download of Tab Suspender for Safari 2.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. Tab Suspender for Safari for Mac is included in System Tools.
From the developer:
Reduce your memory and CPU usage by up to 60% and indirectly your battery consumption by automatically suspending the tabs you aren't using.
How many tabs do you have open that you have not used in hours or even days? That could be making your system run slower.
You may want to check out more Mac applications, such as Tab Suspender, Safari FIDO U2F or Safari Icon Manager, which might be similar to Tab Suspender for Safari.
Browser plugins
Automation