Fathom is a tool designed to help understand web content as humans do, with features including customizable rulesets and optimizers. It is currently used in Mozilla's Activity Stream and has a dedicated community for support and development. The document also includes links to resources and examples for optimizing performance.

2. DOCS & SOURCE
Fathom
Understand the web like humans do.
http://mozilla.github.io/fathom/
IRC #fathom
PERPETRATOR Erik Rose · erik@mozilla.com

4. $95.99
This thing totally spins around
and around.

6. Fathom as Engine
DOM Fathom
Element
type
Ruleset
has a dollar sign
has images nearby to the left
has images nearby above
has a short span of large text
score
notes

7. https://addons.mozilla.org/
en-US/firefox/addon/
fathomfox/

8. Optimizing a Ruleset
Examples
Examples
Ruleset
with free
variables
Optimizer
Examples
Tuned
Ruleset

9. Current Uses
Activity Stream Products Pop-ups

10. It’s Hard to Scroll with Egg on My Hands

11. ! Tuning in FF
! Better optimizer math
! Arbitrary predicates
! Optimal decision trees
! OCaml
The Future

12. DOCS & SOURCE
Fathom
Understand the web like humans do.
http://mozilla.github.io/fathom/
IRC #fathom
GO AND BOTHER Erik Rose · erik@mozilla.com