Mozilla has just released the third Beta release in the Firefox 25.x branch, and it's now available for download and testing, on all available platform.Firefox 25 Beta 3 has been released without much fuss and there aren't any particular details about this version.
The Linux binaries for Mozilla Firefox 25.0 Beta 3 are available for download and users can run them in parallel with the existing installation of Firefox.
In any case, the current beta version sports quite a few changes and improvements. The biggest one is probably the one related to the “find bar” which is no longer shared between tabs.
More details about this release can be found on the official website. Download Firefox 25.0 Beta 3 right now from Softpedia.
Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.