use ~100% cpu

Constantly uses >"70%" in the Firefox Task Manager for the Addon's usage.

Causes my computer to get very hot and very slow

Unlike some of the reviews suggest, this isn't malware, but it does have a bug that causes it to use up a lot of CPU - other than that works great!

probably bitcoin miner or something because it used 120% cpu usage...

This is malware. Consumed up to 8GB of RAM for no reason. Do not install.

I've not checked that extension was doing, but it does some background job because a CPU was loaded even though only one blank tab is opened. More over seems the extension isn't working.

Causes high CPU usage!

Insane high cpu usage. Do not install or your pc will get bloated

Dieses Add-On verursacht eine außergewöhnlich hohe CPU-Auslastung. Es scheint dauerhaft im Hintergrund zu laufen, sobald der Browser gestartet wird.

high cpu usage

Insane CPU usage. Not recommended.

A LOT of CPU usage, removing the addon reduced CPU usage by about 60%

Very high CPU usage. Makes my computer slow to a crawl.

Huge resource problem... Memory leak ?