Generally this is caused by outdated MIME type detection. You're likely using an older/LTS Linux distribution that incorrectly thinks the basilisk binary is a shared library.
You have a few options here: run the basilisk binary from the terminal, create a shell script to run basilisk, or create a .desktop file to run basilisk. There is some discussion in this forum topic that may be benificial to review as well.
In general, no. The official branding has been removed from the Basilisk repo. If you are a Linux distribution package maintainer and would like to package Basilisk for your distribution, please contact me and we can work something out.
Officially the Basilisk Development Team releases binaries for 32 and 64-bit Windows as well as x86_64 and aarch64 Linux. The Linux builds support both GTK2 and GTK3.
There are also beta builds contributed by dbsoft for Intel/ARM macOS and 64-bit x86 FreeBSD.
Let us know if you're able to get Basilisk building on other operating systems and architectures! We'd love to release builds for more systems!
No. Basilisk does not currently support WebExtensions. The Basilisk Development Team believes that XUL extensions are superior in every way.
Yes, but currently there are no language packs available because the Basilisk Development Team members only speak English. If you'd like to contribute a language pack, get in touch!
No, we do not support any of these operating systems, nor do we recommend using them online as they no longer get security updates.
If for whatever reason you do need support for these operating systems, an MSFN user named roytam1 maintains a fork of Basilisk called Serpent for older Windows operating systems. It can be found here.
If you need support for these browsers, please do not ask us for support unless you have verified that the issue you are encountering also occurs on official Basilisk builds. Serpent is not Basilisk. Basilisk is not Serpent.