Use-Case for Browser Extensions vs Using Desktop Apps

I’ve seen this question asked,, 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.