I'd like to find a lightweight, fast browser for Windows 7. I would like it to create ONE task, not a gajillion tasks when there are multiple tabs open (see note at bottom of question). Adblocking is important to me because I have trouble reading with distracting images on the page, especially when they appear with a time lag and the text starts shifting around.
What I have tried so far:
Firefox: Memory usage spikes and I have to restart frequently.
Chrome and Opera: Each tab generates multiple processes, slowing down the computer.
Midori: Font was awful. Could not customize very much. (Example: could not control where the bookmarks were displayed.) Could not find understandable support for Midori for Windows.
I don't mind purchasing or paying a subscription fee if that would help.
Important: I'm happy to provide additional information to the problem description if needed.
(Note: why do I have so many tabs open? Because if I execute a web search about an issue, I find it efficient to do control-enter for each likely-looking hit, and then start skimming the results but moving from tab to tab.)