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Why is that wit every newer version of fire fox more plugins are disabled. Recently Adobe updated their PDF plugin to support FF 4. Now it gets disabled in FF5. Same is the case with DAP.

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How come you people do not understand the concept of backward compatibility. Not all your user will be willing to upgrade to a newer version of FF when they see their most wanted Plugins not compatible. and when there is no new version of those plugins available as on date. Please do not go the way of Windows vista when Hardware was also required to update.You will loose your user base very quickly if you people continue this trend

You bloody people don't know the meening of backward compatability and you are developing products, FF was my most prefered browser but loks like i will be looking to IE or Chrome from now on.You people suck

How come you people do not understand the concept of backward compatibility. Not all your user will be willing to upgrade to a newer version of FF when they see their most wanted Plugins not compatible. and when there is no new version of those plugins available as on date. Please do not go the way of Windows vista when Hardware was also required to update.You will loose your user base very quickly if you people continue this trend You bloody people don't know the meening of backward compatability and you are developing products, FF was my most prefered browser but loks like i will be looking to IE or Chrome from now on.You people suck

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If Firefox disabled some add-ons (especially extensions), it likely is because they include a list of compatible Firefox versions and haven't yet been updated for Firefox 5. The reason more add-ons are being disabled is that add-on developers have not yet become accustomed to the new numbering system for Firefox releases. (I'm not sure I'm ready for it either, but I digress.)

Neither my Flash nor PDF plugins were disabled when updating, and the "More system details" on your post shows both plugins. What Adobe add-on was disabled?

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For extensions, if they worked on Firefox 4, there is a good chance they will work on Firefox 5. You can force Firefox to ignore add-on version restrictions by (what else) installing an add-on:

Add-on Compatibility Reporter :: Add-ons for Firefox

After restarting, a new control should appear next to each extension. You can test whether the add-ons important to you actually work in Firefox 5 and keep them enabled even if their authors have not yet specified version 5. Use at your own risk.

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And please don't tell the volunteers here that we "suck."