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HTTP based ad blocker for Mac OS X

No hacks, no instability
Upgrade Safari whenever you like, no need to wait for an upgraded hack

GlimmerBlocker is no longer maintained and should no longer be used as web sites have migrated from using plain http to using https (i.e. encrypted) which prohibits modification by a proxy unless you resort to install custom SSL certiticates on the client.

You should use a browser extension instead.

It was made as a hobby project during 2007-2008 by Peter Speck. It features both a custom http server and http client and a Mac OS X control panel.

GlimmerBlocker did not only block requests but also allowed for adding custom css and javascript to the pages. It also allowed for modification of the page html before the browser receives the html, which made some modifications much easier than DOM based modifications.

History tab

New tab med recent blocks, whitelistings and transforms. Shows all the rules that modified a request.

Keyword expansion in Safari

Type "wiki great gatsby" in Safari's URL field to perform a Wikipedia search. New default filter includes a bunch of expansions. Supports both Firefox-style simple URL macro expansions and javascript-based expansions. By suggestion from Karsten Bruns.

This works only in Safari because the other browsers have their own support for keyword expansion.

Better error page

Improved "host not found / doesn't respond / etc" error page with links to Google cache, Coral cache, Wayback, WhoIs and Traceroute. By suggestion from Leo M.

Preview when editing rule

Filter rule edit sheet now has a 'preview' button. This temporary applies the new settings. If you click cancel after 'preview', all changes are reverted (and not just those since you clicked 'preview'). This is how Apple describes the 'Apply' button should work, but I'm afraid too many users are used to the Windows standard which takes 'apply' as "save without closing", i.e. commits the changes forever. Suggestion from Nicolas Berloquin.

Other fixes and improvements

Added Javascript can now be placed just after <head> or <body> or just before </head> or </body>. Suggestion from Karsten Bruns.

Limits time the proxy server internally can cache DNS lookups to 30 seconds and to 10 seconds for failed lookups. This should avoid problems with web-sites that changes ip-address. When update of a subscription fail due to "unknown host", GlimmerBlocker now retries after 1 hour instead of 1 day.

Fixed installer problem which made installation fail if the LaunchDaemons directory did not exist. Thanks to Matthias Ruszala for reporting this bug.

Filter edit "summary text" is now replaced with marker in the tab title. Takes less space and the text became way too complex with the new options.

The CONNECT http proxy now only allows port 443 (https) and 563 (snews) to tighten security.

Improved website compability: does not add charset to content-type header if charset was not specified in the headers sent from the server.

You can now drag (or copy) URLs from the suspects tab and the history tab.

After editing a rule, suspects which matches current rules are removed from the suspect list. Re-suggestion from Karsten Bruns.

Version 1.2 was released 2008-12-22. List of release notes.