So yeah, I found this song very cool to listen to, despite it being unusual
in comparison with my normal tastes, so I took it on myself to figure out
the Bass line. It's not 100% correct, but it gives Bassists something to
follow. Hope you enjoy! :)

Tuning: Drop D (DADG)

Basically, the main Bassline that goes through most of the song is as follows:


G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|--------------------(x3)--then---------------------------------|
E|--3--3--3-3-3-3--1--------------3--3--3-5-6--------------------|


G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|------------------(x3)--then-----------------------------------|
E|--3--3--3-3-3-3-1------------3--3--3--3------------------------|

Just repeat all that for the intro and first set of verses, until the
chorus, which goes:

G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|-1-1-1-1-1-1-1-3-4-4-4-4-4-4-4-4-3-3-3-3-3-3-3-3-1-1-1-1-1-1-1-1--|
E|------------------------------------------------------------------|


G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|---------------3-4-4-4-4-4-4-4-4-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3--|
E|-6-6-6-6-6-6-6----------------------------------------------------|

That twice, and then end on this:


G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
E|-3-3-3-3-------------------------------------------------------|

The next set of verses starts like this up to Gerard's lyrics: "Let's have
control for the mix tape master"

G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|(x4)
E|--3--3--3-3-3-3-1-3--3--3--3-----------------------------------|

Then keep playing like the first verses until the chorus:
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|--------------------(x3)--then---------------------------------|
E|--3--3--3-3-3-3--1--------------3--3--3-5-6--------------------|

G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|------------------(x3)--then-----------------------------------|
E|--3--3--3-3-3-3-1------------3--3--3--3------------------------|

Then the Chorus lines

G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|-1-1-1-1-1-1-1-3-4-4-4-4-4-4-4-4-3-3-3-3-3-3-3-3-1-1-1-1-1-1-1-1--|
E|------------------------------------------------------------------|


G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|---------------3-4-4-4-4-4-4-4-4-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3--|
E|-6-6-6-6-6-6-6----------------------------------------------------|

And finally, wrap the song up with the main bassline:

G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|--------------------(x3)--then---------------------------------|
E|--3--3--3-3-3-3--1--------------3--3--3-5-6--------------------|

G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|------------------(x3)--then-----------------------------------|
E|--3--3--3-3-3-3-1------------3--3--3--3------------------------|

Hope this tab helps :) Im sure there's one or two notes I've missed out, but I tend to 
play over the song like this, and it sounds alright. Happy playing!