bookmarks and browsers

Somehow I’m not the ‘tag’ type, though I could possibly become one, if somebody were to go and tag all my bookmarks properly for me. With thousands of bookmarks, that is too much of a chore! So I still work with categories, which can be highly irritating when trying to find a well-nested favorite. Since I use Firefox, I sync my bookmarks with Foxmarks (a GREAT little add-on).
But last week, I was having a bit of an overheating problem on my laptop, and I blamed it on Firefox, which eats up so much CPU & memory that it can cause my Ubuntu Feisty to heat up and shut down. (never had the problem with Dapper, nor with other browsers). Another guy here is having similar problems, related to Firefox, and here is a post touching upon stability issues in Feisty. So I actively searched for other browsers and, of course, bookmarking systems.
I tried Epiphany, the “gnome browser”, again, and LOVED LOVED LOVED how it used almost no CPU or memory. In that respect, Epiphany is a real cool winner. However, the way in which it handles tabs, focus, new tabs, etc, with no real way of tweaking anything with plugins or addons/extensions, really really irked me.
I searched online and saw that many people recommend Iceweasel. I had never heard of the thing before that. I tried it, and really, it’s just a knockoff of Firefox made for Debian. It loaded up all my Firefox settings, tabs, and toolbars, and heated up my laptop just the same.
I almost tried Opera on Feisty, but decided to leave that alone, since I already had it on my Windows partition as a backup (it replaced IE), and though it’s very promising, it didn’t always work as I wanted or expected. (wow, now I see how Firefox has molded me into a different sort of browsing maniac.)
Anyways, back to the bookmarking issue. I truly believe that the ability to easily bookmark and open existing bookmarks is the most important aspect of a good internet browsing experience. The worst thing that could ever happen is I browse, find, and then can’t bookmark. (or go online and can’t find a previously bookmarked page). So, my choice of a browser clearly hinges on this issue, and I just did not have a good time setting up a new bookmarking process!
I exported, imported, uploaded, etc. I researched, then tried Furl & Blinklist. In the past I had attempted del.icio.us, but could never find anything in my “big blob ‘o bookmarks.” I thought other newer alternatives would be better, but none were able to tag my bookmarks according to the categories (notice the plural) they were in. For instance, I could have a page under “websites” –> “design” –> “html”, but these services would only use the “website” tag. Later, when I test-searched my bookmarks, I could never find anything. Plus, I hated having to go to a separate webpage to access my bookmarks. They should be accessible directly from the menu, just like regular bookmarks are!
So, what did I do, in the end? I came back to Firefox & my Foxmarks, which, by the way, has a new button to bookmark from all browsers…and of course I’m trying to keep my laptop as cool as possible…