I got soooo tried of toolbars like Ask and Google changing my startup tabs and then not being able to restore then even using session restore on TabMixPlus XPI
for Firefox to I devised my own method to lock my desired tabs just for me now I share this with you all, note you can still install this XPI make sure that you set it to show homepage on restart so that if you use restart it will still work, as well as just closing the browser window using the usual red right-hand cross
The two modes of TabMixPlus showing Firefox Built in Session Restre and TabMixPlus Session Manager you can't use both at the same time >>
This is a tried and tested 100% to lock your homepage from hijackers and give you the tabs that you want to start with time and time again I have set my two tabs to the Router control panel for Sky Sagem F@ST Router and my FixYa page, use your own...
First create a file called homepage.txt and place these line inside it and save it as a text file with the file extension *.txt
If you want extra tabs add more pipelines | after the aspx then download this and to create a homepage.cfg file use 13 as the shift by valuehttp://home.comcast.net/%7Edabbink/dabbink/Download/ByteShifter.zip
You then need to change the all.js in the C:Program FilesMozilla Firefox folder you need to add this line to the end to action you new file and save it
When you restart Firefox you will see that under the options tab the homepage will be greyed out OR locked.
For a second opinion check this using the about:config option in the MR Tech Toolkit XPI
also worth installing I have used this since it was called local install way back. Then benefits of this method are 100% locked from hijackers and user definable whenever you want to change your homepage just copy and paste the new URLs that you want after each pipeline make sure that you create another cfg file before you start the browser it will fail unless it can read the homepage.cfg file you have been warned.
Here is my Sky Drive Link for an example that you can use HERE
copy the entire folder to you Mozilla Folder then you can use it if you want to change the homepage.txt to add or remove tabs don't forget to Bit Shift it afterwards