Gecko:1.9a2/ReleaseNotes

What should be on this page

There are four categories of items that should be on this page.

• Areas of Focus/Major Changes --- these are areas that all users of the alpha release should pay attention to, and should cover major changes since the last release as well as any known stability or data loss issues that users should be aware of. Issues that may affect web compatibility should also be in this section.

• Minor Changes --- areas that have been improved or changed and deserve explicit mention in the release notes.

• Bugfixes --- specific bugs that were fixed that deserve explicit mention. Items in this category will not make it into the actual release notes page that lives on mozilla.org, but that page will link to this page for those desiring more information.

For reference, here are the 1.9a1 release notes.

Major Changes

• Known memory leak after prolonged browser usage. In order to better handle memory issues, a new garbage collection system has been implemented for native code. However, the process of integrating code into this system is still ongoing, and you may notice excessive memory usage after the browser is used for a long period of time. A restart should fix this problem, which will also be fixed in 1.9a3.

• Changes that refactored intrinsic width computation and incremental layout landed. This means that the code for determining intrinsic widths, used for width calculations in tables, floats, and absolutely positioned elements, has been rewritten. The code for handling incremental layout of pages (as the page arrives over the network, as images load, or as other dynamic changes are made) has also been changed extensively.

• The inline-block and inline-table values of CSS2.1's display property are now implemented.

Minor Changes

• ACID2 compliance. The Gecko layout engine now passes the ACID2 test.