"What is precisely being looked for" is in the first post. OP doesn't want to use Evernote, for whatever reason, and asked for an alternative that allows web clipping and is available "on the web". While UR isn't available as a web app it can be viewed on other computers via Dropbox.
That's all; just an alternative. Pretty clear what was asked IMO.
Well, I can't see that's really correct.
The second post by the OP added the need for a desktop client; and the third post added the need for compatibility with Opera/Chrome. The second post also said that there was no need for all the features of Evernote, so long as there was clipping and note-taking.
Seems to me that Evernote actually meets this combination of needs better than most of the suggested alternatives (the ones I know anyway), which leaves me with the question of what precisely is being looked for. I'm assuming that there is a problem with Evernote, but, given the set of posted requirements, it seems easier to see what is wrong with the alternatives.
I certainly see most of Snail02's POV. I too use Opera, with Chrome as my preferred backup. I too have tried FF and find it just does not work for me, though I can see the attraction of the extensions. I also enjoy having access to some info over the web, but also having everything available through desktop clients and local storage. For me, EN does OK for this, so I wonder what the problem is for Snail02.