I'm quite new to Adobe Illustrator, but used to PS.
I created some kind of background-layer and filled it with a rect. That has a pattern as background-image (Adobes Waffelmuster - Doppelt).
I then created a second layer and added several filled paths to it. I tried to align these paths as best as I could to the background-pattern of my first layer.
When I export my graphic as SVG, my paths are not aligned to the background as in Illustrator. It seems they shifted a little bit to the right. Also, if I zoom in Firefox (STRG,+) the mismatch becomes even bigger.
Why is that and how can it be prevented? Is there something like relative and absolute positioning?