how do I remove extensions that do not have a remove choice
I want to remove the following extensions: 1) java console "several that are obsolete" 6.0.17 thru 6.0.26 2) AVG security toolbar 6.103.018.001 3) AVG safe search 9.0.0.911 4)Microsoft.net framework assistant 0.0.0
Wšě wotmołwy (1)
These are probably "globally installed add-ons" that are parts of other programs you have installed on your computer. The easiest solution is just to disable them instead of uninstalling them.
For other possible solutions, see Cannot remove an add-on (extension or theme).