Use Nexus Personal ("BankID") with Firefox without installing it

Question

I will describe how to utilize Nexus Personal as a plugin for Firefox without installing the package from AUR or running the installation script that comes with the program.
And why would I do that? Firstly; the root partition on the system that I use has very limited space. If the files that are used for Nexus Personal are located elsewhere (like my home folder, on another harddrive) it will free up some valuable space. Secondly; to keep an record of the procedure. If I ever must repeat the process I can check back at this reference. Thirdly; upgrading should be trivial and just a matter of copying the new version of the program to a certain folder. Lastly; maybe someone else might also benefit from this.
Download and unpack the files and place the folder where you want the program to be (e.g. /home/kalle/Applications/nexus/)¹. Make sure that the files persadm and personal.bin have permission to be executed.
Let Firefox know where the plugin is located by creating a symbolic link in the Firefox plugins folder to the file libplugins.so by running the command sudo ln -s /home/kalle/Applications/nexus/libplugins.so /usr/lib/mozilla/plugins/libplugins.so
Copy the shell script² personal.sh to folder /usr/local/bin/ by running the command: sudo cp /home/kalle/Applications/nexus/personal.sh /usr/local/bin/personal.³
Now, open the copy with a text editor and change the two lines to point at the program folder (this should be obvious).
Make a symbolic link to the program folder in /usr/local/lib/ with the command: sudo ln -s /home/kalle/Applications/nexus/ /usr/local/lib/personal
Open the file /etc/ld.so.conf in a text editor and add a line with the path of the program folder⁴. Finally, run the command sudo ldconfig.⁵
Once you start Firefox the plugin should be recognized and operational (hopefully).
For those who don't know:
Nexus Personal, or "BankID", is a proprietary program that can be used as a method for personal identification, and is used on the websites of various Swedish authorities, banks, etc.
I'm not sure if this is the appropriate place to be writing this, but I couldn't think of any other.
Clarifications:
¹: where "kalle" should be your username. You can put the program folder with the extracted files wherever you want, though. /home/kalle/Applications/nexus/ is just a mere example.
²: located among the extracted files.
³: notice the slight difference in the name (the copy should not have an extension).
⁴: the line should contain just "/home/kalle/Applications/nexus/"
⁵: this seems to be required to do in order to make the plugin find its required libraries that comes with the program.
General tips for troubleshooting:
Invoking the command ldd can be used to check if the plugin executables has their required libraries set up correctly.
In Firefox you can also write about:plugins in the address bar in order to see if the browser is following the symbolic link that is located in /usr/lib/mozilla/plugins/.

Answer 1

http://portableapps.com/apps/internet/firefox_portable