it's often lagging the web page down :-(

This add-on is good but as Firefox progresses through newer version, compatibility-issue comes in. Firefox version 59 drops it every time it starts and has to install this add-on again. Firefox newer version problem or MUA no longer meets the requirements of newer version Firefox - needs to be investigated

အဝိုင္​းပ​ေလး​ေတြ ​ေပၚတယ္​။ ဥပမာ ျပဆိုရင္​