https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/webextension-replacements/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/essential-webextensions/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/productivity/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/privacy-webextensions/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/hack/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/webextensions/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/opensearch/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/legacy/
https://addons.mozilla.org/en-US/firefox/collections/DavidHedlund/icedove/