If I close all the "dead" acroread tabs, and then open a PDF again, firefox starts acroread from the scratch and everything works again for a short while. For example, in case (b) - navigating from PDF to PDF, I click the link, the tab dies, I copy the URL, close the tab, open a new tab again and paste the url back, getting to the next page.
If I close all the "dead" acroread tabs, and then open a PDF again, firefox starts acroread from the scratch and everything works again for a short while. For example, in case (b) - navigating from PDF to PDF, I click the link, the tab dies, I copy the URL, close the tab, open a new tab again and paste the url back, getting to the next page.