Hi, if you suspect Tab Stash is causing high RAM usage, please feel free to open an issue on GitHub and I'd be happy to help you troubleshoot.

Note that by default, Tab Stash will unload older stashed tabs to prevent memory use from growing too high, and the defaults are calibrated even for lower-spec computers with less memory than yours. So absent a bug, you should not have to worry about memory usage with Tab Stash.