Comment 4 for bug 732634

I can see that nested progress bar support was introduced in bug 530027.

To me the progress bar has several restarts:
- partitioning resets it back to 0 multiple times
- copying files stage
- "the rest" aka plugininstall

There are possibly additional progress bars that could be launched.

Looking at the logs it's hard to see which progress bars are nested and which are not.

My idea is to take typical install, look at the times and approximately spit the progress bar to get both even and approximately smooth progress bar. It will go through faster & slower sections, but should be ok.