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Some web sites are not fully functional with latest Firefox running on my desktop. For instance: a website now does not allow me to link to certain pages -error

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Recently upgraded to 42.0 on my computer.

One site where I used to go to check my utility bill does not accept my log in entries. Locks my account after repeatedly trying the correct user name and password. Opens fine with Safari. Another site does not allow me to access Estatements. Error message. Functionality on site it otherwise good. Works with Safari. I'd rather not use Safari.

Recently upgraded to 42.0 on my computer. One site where I used to go to check my utility bill does not accept my log in entries. Locks my account after repeatedly trying the correct user name and password. Opens fine with Safari. Another site does not allow me to access Estatements. Error message. Functionality on site it otherwise good. Works with Safari. I'd rather not use Safari.

Chosen solution

This issue can be caused by corrupted cookies or cookies that are blocked.

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox > Preferences > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox > Preferences > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

If clearing cookies didn't help then it is possible that the cookies.sqlite file that stores the cookies got corrupted.

  • Rename (or delete) cookies.sqlite (cookies.sqlite.old) and if present delete cookies.sqlite-shm and cookies.sqlite-wal in the Firefox profile folder in case cookies.sqlite got corrupted.

You can use this button to go to the current Firefox profile folder:

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Use this link to check that your plugins are up-to-date. If any are listed as unknown or research, do not worry about them.


Many site issues can be caused by corrupt cookies or cache.

  • Clear the Cache and
  • Remove Cookies
    Warning ! ! This will log you out of sites you're logged in to.

Type about:preferences<Enter> in the address bar.

  • Cookies; Select Privacy. Under History, select Firefox will Use Custom Settings. Press the button on the right side called Show Cookies. Use the search bar to look for the site. Note; There may be more than one entry. Remove All of them.
  • Cache; Select Advanced > Network. Across from Cached Web Content, Press Clear Now.

If there is still a problem, Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?

Then restart.

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Chosen Solution

This issue can be caused by corrupted cookies or cookies that are blocked.

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox > Preferences > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox > Preferences > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

If clearing cookies didn't help then it is possible that the cookies.sqlite file that stores the cookies got corrupted.

  • Rename (or delete) cookies.sqlite (cookies.sqlite.old) and if present delete cookies.sqlite-shm and cookies.sqlite-wal in the Firefox profile folder in case cookies.sqlite got corrupted.

You can use this button to go to the current Firefox profile folder:

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You also might try typing your password into another program where you can see the characters, then copy/paste to the password field on the website and see whether that works. If it does, perhaps something is modifying the letters and numbers as you type into that field, such as anti-keylogger software or a similar add-on.