Help reading Process Explorer please?

Basic way to trouble shoot Firefox is to disable all optional add-ons and other enhancements, (disable the ones you really need, uninstall any that you don't often use ).

Reboot FF and see what happens, if your exceptions are random then the time you allow for this phase is always a lottery, but your experience will guide you.

If you get an exception in this clean boot then the issue is either within the main body of FF or in some other running program, If it's in FF then one of the BETA or Daily Builds could be a way to stop things quickly, other running programs is just a matter of closing them down until you no longer see the Exception. Takes a while but a logical approach is the best way.

If the exception does not appear with the add-ons disabled / Uninstalled the re-enable then one at a time until you see the exception again, one you know that this is the add-on with the issue - either find an alternative, check for updates, or even try contacting the developer directly.

This can be a long process especially with a number of add-ons as there is a chance that two separate add-ons interacting with each other and the permutations can quickly grow, which is why a lot of users put up with this type of issue if it is not to much of a problem, and the natural speed of development in Browser technologies means that faults often "go Away by themselves"

I have all those and quite a few others, of the ones you have, Google Update is set to Always Ask, whilst the others are set to Always Activate. I'm not getting the issues that you are, so hopefully a similar set-up may work for you :)

Shockwave Flash is actually a Depreciated program these days, all the pressure is to go with the newer, more secure, HTML5 for processing the same sort of content. unfortunately some large worldwide distributors are a little slow to make the jump to the new way, so disabling the plug-in can be a bit of a lottery, As I type here I have streamed TV playing on my second monitor, using Flash of course

Flash is used by Firefox to play certain types of media files, you can remove flash, but those types of media will no longer work, and the major websites that still use flash will bonmbard you with requests to install it for "a richer web experience"

an idea of some of the issues is here ...

https://medium.com/@h_a_l_e_x/why-we...6ca#.m1tqk76ns