I have the critical update for the 2.5.8 DXG except this might not work for a DXG at 3.4.2. I don't know if this is enough to allow full internet access like the 3.4.2 of this thread. I doubt this update is enough and the 3+ series browser is way better than the 2.5.8 browser. I expect somebody would need to grab the 3.4.2 critical update to fix the changes expected in March 2016. For the changes limited to 2.5.8 see here:
https://www.mobileread.com/forums/sho...5&postcount=30