Here's the verse riff.

E5 (022xxx@1)      G5Eb (355xxx@1)-------------------|--
Bb -------------------|--
Gb -------------------|--
Db -----2--------5----|--
Ab -----2--------5----|--
Eb -0-----0--3-3---0--|--

The chorus is just the same chords, except open.
nirvana
Dumb

Verse:
 
     E (022100@1) GEb (320003@1)---0---3--|-
Bb ---0---3--|-
Gb ---1---0--|-
Db ---2---0--|-
Ab ---2---2--|-
Eb ---0---3--|-

On the second chorus this bridge appears, the last time strum C once.

B (x2444x@1)       CEb (x32010@1)---2-2-2-2-23-3-3-3-3--|-
Bb ---4-4-4-4-45-5-5-5-5--|-
Gb ---4-4-4-4-45-5-5-5-5--|-
Db ---4-4-4-4-45-5-5-5-5--|-
Ab ---2-2-2-2-23-3-3-3-3--|-
Eb ------------------------|-

That's it.