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We will remove the user and pass from the URL for Histories and Favicons using nsIOService::CreateExposableURI()[1], then store them to the database. And, for Favicons. And, for Favicons, we will also read them. Therefore, as the frequency calling CreateExposableURI() will be higher, we want to optimize it. Currently, CreateExposableURI() gets/copies the String of UserPass to check whether there is a user pass info in the URL[2]. Its copying will be waste. To prevent it, implement hasUserPass in nsIURI, and refer to it instead. [1] https://searchfox.org/mozilla-central/rev/90dce6b0223b4dc17bb10f1125b44f70951585f9/netwerk/base/nsIOService.cpp#1031 [2] https://searchfox.org/mozilla-central/rev/90dce6b0223b4dc17bb10f1125b44f70951585f9/netwerk/base/nsIOService.cpp#1017 Differential Revision: https://phabricator.services.mozilla.com/D193623
An explanation of the Firefox Source Code Directory Structure and links to
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https://firefox-source-docs.mozilla.org/contributing/directory_structure.html
For information on how to build Firefox from the source code and create the patch see:
https://firefox-source-docs.mozilla.org/contributing/contribution_quickref.html
If you have a question about developing Firefox, and can't find the solution
on https://firefox-source-docs.mozilla.org/, you can try asking your question on Matrix at chat.mozilla.org in `Introduction` (https://chat.mozilla.org/#/room/#introduction:mozilla.org) channel.
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https://www.mozilla.org/firefox/channel/desktop/#nightly
Keep in mind that nightly builds, which are used by Firefox developers for
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