Rated 3 out of 5 stars

Hi Stef,

an easy trick:
Go to Tools ->Options ->Tab ->Button Config-Editor and, search for extensions.dictionary-switcher.autodetect and set it to FALSE.

After my installation this option was set to TRUE. This forces the add-on to check continously, whether the dictionary language should be switched automatically ... and this cuts the performance!

By setting that option to FALSE the problem disapears.

Good luck!

This review is for a previous version of the add-on (1.1.3).