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Google can do (1) because they crawl the entire web constantly. That's not going to be a trivial feature to add for anyone else. (2) is also probably a side eff
by mprovost 14y ago
Google can do (1) because they crawl the entire web constantly. That's not going to be a trivial feature to add for anyone else. (2) is also probably a side effect of crawling pretty much everything before you ask for it.
- haydenchambers 14y ago(1) try femtoo.com it registers changes on selected parts of selected sites