uBlock Origin (https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/?src=search) (not to be confused with uBlock) has a given place in https://addons.mozilla.org/en-US/firefox/collections/mozilla/privacy/
Basic Icedove 31.8.0 support have been added since uBlock Origin 1.3.2.
uBlock Origin have features that currently other blockers lacks, including uBlock:
- Inline script tag filtering
- Default strict blocking. Completely block blacklisted domains (including popunders).
Source: https://directory.fsf.org/wiki/Free_Software_Directory:IceCat_extensions_(proposed)#OpenSearch