Can't find "Seostack Keyword Tool" extension
I'm trying to find an extension on Mozilla Firefox ""Seostack Keyword Tool" but couldn't find it.
I need this extension for my website https://anyboxinggloves.com/, as I need to update it weekly, as a SEO point of view.
This extension provide all keyword related to our niche in just 1 click. I've this on Chrome but, I do use Mozilla normally, and don't want to switch again and again to chrome.