I generally try not to use any, because for some reason I can't force myself to trust an extension w/o looking into its code--the process that eats too much time.
So I have only 5 of them installed.
From chrome web store:
* blank ntp (shows a blank page, rather than the chrome default)
* ublock origin (duh)
Not from the web store (I "trust" them, for I wrote them):
I assume you also looked into the entire code base for Chromium (you are using Chromium, aren't you? Using Chrome - with its abundance of closed source gimmickery - would not make sense given your statement) before deciding it was worth your trust?
While I understand why you'd want to look at extension code before installing it I do not understand the trust in Chrome. Given the size of the code base it is more or less impossible for a single person to decide its trustworthiness by 'looking at the code', given that a single intentional 'mistake' can make the difference between trust and thrash.
yes, I use Chromium, but mainly because Fedora doesn't have Chrome in their pkg repos. yes, I've looked into the Chromium src & have run away screaming, mainly because I'm not a big C++ fan.
I'm fine w/ Google products. I don't trust a random extension from a random Vasya ThE HacKeR, especially w/ "read & change all your data" permissions.
So I have only 5 of them installed.
From chrome web store:
* blank ntp (shows a blank page, rather than the chrome default)
* ublock origin (duh)
Not from the web store (I "trust" them, for I wrote them):
* copy_anchor_text
* dereferrer
* hn-dweller