Display includes lots of diamonds with question marks. Some are from curly quotation marks, which Firefox never did display correctly, but there are more than ever with 5.0
PS the opposite problem, HTML code shows, in the American National Biography database. There, quotes sometimes show as """ and apostrophes sometimes display "r" never happened before and IE works fine.
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go to Help Menu -> select "Restart with Add-ons Disabled"
Firefox will close then it will open up with just basic Firefox. Now do this:
-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/
-> go to View Menu -> Zoom -> click "Reset"
-> go to View Menu -> Page Style -> select "Basic Page Style"
-> go to View Menu -> Toolbars -> unselect unwanted toolbars
-> go Tools Menu -> Clear Recent History -> Time range to clear: select EVERYTHING -> click Details (small arrow) button -> place Checkmarks on ALL Options -> click "Clear Now"
-> go to Tools Menu -> Options -> General -> When Firefox starts : select "Show My Home Page" -> Type the address of the website which you want to be your HomePage e.g. http:www.google.com -> click OK
-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click "Manage Search Engines" -> select unwanted search engines and click Remove -> click OK
-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE any Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox
You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.
Which encoding is selected on pages where you see this?
- Firefox > Web Developer > Character Encoding
Can you post a link?
Unicode.
You may need a Western encoding like Western (ISO-8859-1) if characters are missing or you see question marks.
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
- Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
- Tools > Options > Privacy > Cookies: "Show Cookies"