Every time you add an extension or plugin to your browser, there's a risk that you might be doing more than managing your cryptocurrency wallet, generating passwords, taking notes, or tracking sports results. There's a chance that you have just handed a complete stranger access to your savings.
Read more in my article on the Hot for Security blog.
Graham Cluley
Source: GrahamCurley
Source Link: https://www.bitdefender.com/en-us/blog/hotforsecurity/malicious-firefox-add-ons-stealing-cryptowallet-seed-phrases-browser-credentials