How can I prevent Firefox Sync from syncing home page?

I use different home pages at work and at home and I would like to prevent the home page from syncing.

There are services.sync.prefs.sync prefs related to which prefs to sync and you can set the corresponding services.sync pref to false to prevent syncing that pref.
You can set the pref services.sync.prefs.sync.browser.startup.homepage to false on the about:config page.
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website. 
If you see a warning then you can confirm that you want to access that page. 
*Use the Filter bar at to top of the about:config page to locate a preference more easily.
*Preferences that have been modified show as bold(user set).
*Preferences can be reset to the default or changed via the right-click context menu.

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== This happened ==
Every time Firefox opened

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There are services.sync.prefs.sync prefs related to which prefs to sync and you can set the corresponding services.sync pref to false to prevent syncing that pref.
You can set the pref services.sync.prefs.sync.browser.startup.homepage to false on the about:config page.
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website. 
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I have clicked and dragged the icon a hundred times, and still when I click on Firefox a previously set up home page appears.
This is very annoying because I can get to my homepage; but I have to sign on to yahoo e-mail every time; then go to my homepage and my bookmarks. I can't seem to get it to except the homepage I want to use..

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Cate Kurtis wrote:
Well, in fact the application stopped opening automatically for no reason that is clear to me. For about 5 days after I updated the software it opened automatically when I plugged in or unplugged my phone. Then it suddenly stopped. All I did between the last automatic open and the time that it ceased was, in the options window, uncheck the "manually manage music and videos" option and then check it again without clicking "apply" and also checking "sync only checked songs and videos" and unchecking again without clicking apply.
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How can I prevent Firefox Sync from syncing home page?

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