-- Konqueror
      \
       -- Safari
         \
          -- Chrome, Chromium, Opera 15+

If you want to go further Firefox's lineage is interesting but it's parent browsers are all dead.

Everyone forgets the people who created/invented the things Apple puts in its software.

  -- NCSA Mosaic
    \
     -- Spyglass Mosaic
       \
        -- MSIE
          \
           -- Spartan

I'd be really interested to know how much code from Spyglass or NCSA Mosaic survives in modern versions of Internet Explorer (and even Spartan).

Spartan/IE engineers -- any info?

    -- Internet Explorer 6-8
    -- Internet Explorer 9-10
    -- Internet Explorer 11
    -- Internet Explorer new?

    -- Firefox
    
    -- Konqueror (abandoned?)
      \
       -- Safari
         \
          --Chromium, Opera 15+
             \
               -- Chrome
         \ 
           --IOS safari

    -- Opera 12 (abandoned)

and that's why i use and only advertise firefox. It is the only browser that respect webdevelopers.

Konqueror is not abandoned, but Rekonq is generally the premier KDE browser nowadays. Any KDE install still includes Konqueror, even if it is not the default browser, because its backends power a lot of various parts of a KDE desktop.

What about chrome doesn't respect web developers? Chrome's web debugging in browser is very good, and until recently firefox didn't even compete in that regard.

Are you kidding? Firebug was the gold-standard for a very long time, and for a very good reason. If you're talking Firefox's built-in tools, then sure, but talking about Firefox while ignoring extensions is laughable.

IE invented that. and ie + visual studio to debug JavaScript is years ahead of both chromium and Firefox. does that mean you should now love ie?

Firefox didn't make Firebug though. Chrome has supported developers directly a lot longer than Firefox has.

what's the difference of Firefox doing something vs Firefox enabling people to do something?

the later is actually even better.

also, Firefox has venkman before all that.

sign. kids and Google marketing

And Chrome's developer tools were based on the stuff written by Apple for Safari.

"but sadly we have only 3.5 major engines competing at this point." I actually, don't think rendering engine competition is a great thing. I think competing browser products is a great thing. Think about node.js and io.js or rails and merb... it's not necessarily a good thing. Everyone kind of assumes that more rendering engines is good thing but I think it's just important that we have at least one healthy open source option. We have 3

blink webkit gecko

The closed source solutions are the ones we need to hope and pray die away trident. They're evil because there is no hope for any innovation as we saw in the last decade with IE6. MS can do anything they like to re-market their browser but as long as it's closed source engine it has no place in the web IMO. I hope it reaches 1% market share and is forced to go the way of Opera.

Let's not forget links and w3m.

I'm surprised no one mentioned lynx first.

I would have mentioned lynx but wasn't sure it still existed.

Blink unloads a lot of legacy components in a way that Microsoft is attempting to do now.