I'm using Ubuntu 14.04 and I use the Perapera Chinese add-on for Firefox. It worked up to version 39, but now in version 40 it just stopped working. So I tried to downgrade to version 39 following this link, where there are two options:
1) Choose from the list here, but I have no idea which of the 11 subversions should I use.
2) Download the only version suggested in the link above, i.e. this.
I chose the 2nd option, but after decompressing the file, I have a 'Firefox' folder with lots of files and executables that don't run, just give an error message:
XPCOMGlueLoad error for file (...)/firefox/libxul.so: libXcomposite.so.1: cannot open shared object file: No such file or directory Couldn't load XPCOM.
There's a 'run-mozilla.sh', but 'bash run-mozilla.sh' gives:
run-mozilla.sh: Cannot execute .
I REALLY would like to use Perapera add-on to study Chinese. So, is there an easy way to downgrade to Firefox 39? Thanks in advance.