Upgrading to v24 or v26 (or upcoming v27) are both welcome. Just some more Pros and Cons with going with v26, since the choice seems to be v24: Pros: no performance regressions;it's a newer version and mozilla developers could be more involved in helping and improving it;more time to progressively test and find bugs, updating to v27, v28, ... up until v31 is finally released;can be easily patched with test patches if needed;when v31 will be used, comparison will be done against a version as fast as v1.8.5, if using v24 now and upgrading later to v31 it will be faster than v24, but it will be difficult to say if it's faster than v1.8.5.Cons: Linux distro should compile against embedded version. It would better to avoid it, but it's not really a problem, there are other games doing the same, e.g. supertuxkart, see here;it adds more code to svn, there are some other things that could be removed anyway, e.g. bundled enet.Anyway the long term will be v31 with the option of using the system lib. In the meantime... thanks for all the months of work done so far!