Use-Case for Browser Extensions vs Using Desktop Apps

I’ve seen this question asked, https://discuss.privacyguides.net/t/password-manager-safer-with-browser-extension-or-copy-drag-auto-type/11466?u=seek.veritas, and it is relevant to me as well. I’m new to the privacy and security space and am curious as to if I should be using a password manager extensions (along with other types of extensions (email aliasing, etc.) for the convenience sake. I’ve been doing this method for awhile as I value the convenience but wanted to make sure that this wasn’t a huge privacy and security risk. What other options are there? Would I either have to use the web or desktop versions and copy/paste? Seems monotonous.