Firefox is always set to never ask or save anything
Specifically Firefox is always set to "Never remember history"
And Firefox is set to "Delete cookies & site data when Firefox is closed"
Of course, Firefox opens to a blank page, namely "about:blank"

Yet Firefox is saving stuff that it promised it wouldn't be saving.
Worse - Firefox won't say what that stuff it's saving is.

Firefox is just saying that it saved it.
But won't tell me what it is.

To reproduce.
1. Start Firefox 109.0.1 (32-bit) on Windows
2. Go to "about:preferences"
3. Press on "Privacy & security"
4. Scroll to "Cookies & site data"
Invariably, Firefox will tell you how much it saved that it shouldn't have.
"Your stored cookies, site data, and cache are currently using (some amount
of bytes) of disk space".

Then it gives a completely useless link saying "learn more", where the link
isn't useless for what it says, but because it's not telling us the truth.

Learn more.
https://support.mozilla.org/en-US/kb/storage?as=u&utm_source=inproduct&redirectslug=permission-store-data&redirectlocale=en-US

When I click on "Manage data", invariably there is nothing.
So where is this "stored cookies, site data, and cache" coming from?

Why does Firefox insist on hiding from me what it's saying it saved?

When I click on the "Clear data" button, it comes up with a form saying
"Clearing all cookies and site data stored by Firefox may sign you out of
websites and remove offline web content. Clearing cache data will not
affect your logins.

Cookies and Site Data (0 bytes)
Cached Web Content (some amount of bytes)

Clear.
Clear Now.

Only after all that does Firefox finally clear what it lied about not
saving but what's much worse is I can't FIND what it's storing or where.

Can you?

On 7/16/2023 8:36 PM, Incubus wrote:
> Firefox is always set to never ask or save anything
> Specifically Firefox is always set to "Never remember history"
> And Firefox is set to "Delete cookies & site data when Firefox is closed"
> Of course, Firefox opens to a blank page, namely "about:blank"
>
> Yet Firefox is saving stuff that it promised it wouldn't be saving.
> Worse - Firefox won't say what that stuff it's saving is.
>
> Firefox is just saying that it saved it.
> But won't tell me what it is.
>

I have never had the problems you have described. Most stupid people
flock to Mac. Maybe you should join them.

> To reproduce.
> 1. Start Firefox 109.0.1 (32-bit) on Windows
> 2. Go to "about:preferences"
> 3. Press on "Privacy & security"
> 4. Scroll to "Cookies & site data"
> Invariably, Firefox will tell you how much it saved that it shouldn't
> have.
> "Your stored cookies, site data, and cache are currently using (some
> amount
> of bytes) of disk space".
> Then it gives a completely useless link saying "learn more", where the
> link
> isn't useless for what it says, but because it's not telling us the
> truth.
>
> Learn more.
> https://support.mozilla.org/en-US/kb/storage?as=u&utm_source=inproduct&redirectslug=permission-store-data&redirectlocale=en-US
>
>
> When I click on "Manage data", invariably there is nothing.
> So where is this "stored cookies, site data, and cache" coming from?
>
> Why does Firefox insist on hiding from me what it's saying it saved?
>
> When I click on the "Clear data" button, it comes up with a form saying
> "Clearing all cookies and site data stored by Firefox may sign you out of
> websites and remove offline web content. Clearing cache data will not
> affect your logins.
>
> Cookies and Site Data (0 bytes)
> Cached Web Content (some amount of bytes)
>
> Clear.
> Clear Now.
>
> Only after all that does Firefox finally clear what it lied about not
> saving but what's much worse is I can't FIND what it's storing or where.
>
> Can you?

On 17 Jul 2023 00:36:41 -0000 (UTC) Incubus wrote:
>
>Cookies and Site Data (0 bytes)
>Cached Web Content (some amount of bytes)
>
>Clear.
>Clear Now.
>
>Only after all that does Firefox finally clear what it lied about not
>saving but what's much worse is I can't FIND what it's storing or where.
>
>Can you?

You want to see the cache?
about:cache

Mind you, it's still storing session data in memory. So pull the plug out.
--
(Remove numerics from email address)

Cached pages are not the same as site data.

What are you up to that you're so paranoid about being stored?

--
Brian Gregory (in England).

Brian Gregory <void-invalid-dead-dontuse@email.invalid> wrote

> What are you up to that you're so paranoid about being stored?

It's classic for people to blame the victim for privacy flaws in Firefox.

On 20/07/2023 02:57, Lord Vader wrote:
> Brian Gregory <void-invalid-dead-dontuse@email.invalid> wrote
>
>> What are you up to that you're so paranoid about being stored?
>
> It's classic for people to blame the victim for privacy flaws in Firefox.

The cache is there to speed things up.
If you really don't want anyone to be able to see you plotting your
terrorist activities use full disk encryption with a strong password.

On the other hand if you really just want the cache cleared when you
exit from Firefox then do that instead of confusing site data with cache.

--
Brian Gregory (in England).

On 7/19/2023 9:57 PM, Lord Vader wrote:
> Brian Gregory <void-invalid-dead-dontuse@email.invalid> wrote
>
>> What are you up to that you're so paranoid about being stored?
>
> It's classic for people to blame the victim for privacy flaws in Firefox.
>

You can set cache2, to use RAM.

When you exit the browser, the RAM is deallocated and information content is lost.

"Switched browser cache from disk (SSD) to RAM, about:cache still displaying in disk too"

https://support.mozilla.org/en-US/questions/1313570

Paul

On 2023-07-17, Dave Royal <dave@dave123royal.com> wrote:
> You want to see the cache?
> about:cache
>
> Mind you, it's still storing session data in memory. So pull the plug out.

Thank you for the suggestion of "about:cache" which contains a lot of
gibberish that means something, I'm sure, to Firefox experts, but not to
me.

Why is it saving that gibberish?
Why can't it delete it like it's supposed to when I close Firefox?

All I want is Firefox to start clean upon every invocation.
Why is that so hard to do?

On 7/20/2023 4:32 PM, Incubus wrote:
> On 2023-07-17, Dave Royal <dave@dave123royal.com> wrote:
>> You want to see the cache?
>> about:cache
>>
>> Mind you, it's still storing session data in memory. So pull the plug
>> out.
>
> Thank you for the suggestion of "about:cache" which contains a lot of
> gibberish that means something, I'm sure, to Firefox experts, but not to
> me.
>
> Why is it saving that gibberish?
> Why can't it delete it like it's supposed to when I close Firefox?
>
> All I want is Firefox to start clean upon every invocation.
> Why is that so hard to do?

It is very easy to find. You just didn't look.

Copy this to your Firefox address line:

about:preferences#privacy

Scroll down and check the box that says:

Delete cookies and site data when Firefox is closed

On 2023-07-20, Mighty Wannabe wrote

>> All I want is Firefox to start clean upon every invocation.
>> Why is that so hard to do?
>
> It is very easy to find. You just didn't look.
>
> Copy this to your Firefox address line:
>
> about:preferences#privacy
>
> Scroll down and check the box that says:
>
> Delete cookies and site data when Firefox is closed

That's a great idea!
But it was done years ago, well before I ever posted this thread.

That's why I said Firefox is lying when it says it will "delete cookies and
site data when Firefox is closed". That's a lie. It leaves the cache data.

For some reason, Firefox is lying about deleting _all_ the data.
However, what I've done since though is follow Paul's suggestion.

https://support.mozilla.org/en-US/questions/1313570
1. Start firefox & go to about:config
2. Change "browser.cache.disk.enable" from true to false
3. Change "browser.cache.disk_cache_ssl" from true to false

Now the cache will be in RAM instead of on your hard drive.

I haven't fully tested it so I wasn't going to say anything yet, but I'm
just responding to you that it would be great if Firefox told the truth.

But that setting you proposed does not cause Firefox to start clean.
Which, after all, if it did, then this thread would never have been needed.

On 7/20/2023 7:02 PM, Incubus wrote:
> On 2023-07-20, Mighty Wannabe wrote
>>> All I want is Firefox to start clean upon every invocation.
>>> Why is that so hard to do?
>>
>> It is very easy to find. You just didn't look.
>>
>> Copy this to your Firefox address line:
>>
>> about:preferences#privacy
>>
>> Scroll down and check the box that says:
>>
>> Delete cookies and site data when Firefox is closed
>
> That's a great idea!
> But it was done years ago, well before I ever posted this thread.
>
> That's why I said Firefox is lying when it says it will "delete
> cookies and
> site data when Firefox is closed". That's a lie. It leaves the cache
> data.
>
> For some reason, Firefox is lying about deleting _all_ the data.
> However, what I've done since though is follow Paul's suggestion.
>
> https://support.mozilla.org/en-US/questions/1313570
> 1. Start firefox & go to about:config
> 2. Change "browser.cache.disk.enable" from true to false
> 3. Change "browser.cache.disk_cache_ssl" from true to false
> Now the cache will be in RAM instead of on your hard drive.
>
> I haven't fully tested it so I wasn't going to say anything yet, but I'm
> just responding to you that it would be great if Firefox told the truth.
>
> But that setting you proposed does not cause Firefox to start clean.
> Which, after all, if it did, then this thread would never have been
> needed.

There might be some antivirus software preventing Firefox from deleting
some files. I have been using the portable version of Firefox for ages.
And I always use the portable versions of  all of my favourite software
if I can find them. Some software would offer their own portable
version, usually in a zip file.

Maybe you should give Portable Firefox a shot. This website is very
reliable:

https://portableapps.com/apps/internet/firefox_portable

After you have downloaded the executable file and run it, it will create
a folder with everything required to run Firefox inside the folder.
Nothing is in the Windows Registry. I usually keep all my portable
software in a top-level folder in Drive D. You can make duplicate copies
of the folder. If you want to be extra careful with your online banking,
you can reserve one Portable Firefox folder exclusively for online banking.

You can tell Firefox to clean up everything after you close Firefox, but
some websites will have a lengthy login when they cannot find their
cookie in your browser. You can figure out how to tell Firefox to leave
those specific cookies alone.

On 7/20/2023 8:48 PM, 😎 Mighty Wannabe ✅ wrote:
> On 7/20/2023 7:02 PM, Incubus wrote:
>> On 2023-07-20, Mighty Wannabe wrote
>>>> All I want is Firefox to start clean upon every invocation.
>>>> Why is that so hard to do?
>>>
>>> It is very easy to find. You just didn't look.
>>>
>>> Copy this to your Firefox address line:
>>>
>>> about:preferences#privacy
>>>
>>> Scroll down and check the box that says:
>>>
>>> Delete cookies and site data when Firefox is closed
>>
>> That's a great idea!
>> But it was done years ago, well before I ever posted this thread.
>>
>> That's why I said Firefox is lying when it says it will "delete
>> cookies and
>> site data when Firefox is closed". That's a lie. It leaves the cache
>> data.
>>
>> For some reason, Firefox is lying about deleting _all_ the data.
>> However, what I've done since though is follow Paul's suggestion.
>>
>> https://support.mozilla.org/en-US/questions/1313570
>> 1. Start firefox & go to about:config
>> 2. Change "browser.cache.disk.enable" from true to false
>> 3. Change "browser.cache.disk_cache_ssl" from true to false
>> Now the cache will be in RAM instead of on your hard drive.
>>
>> I haven't fully tested it so I wasn't going to say anything yet, but I'm
>> just responding to you that it would be great if Firefox told the truth.
>>
>> But that setting you proposed does not cause Firefox to start clean.
>> Which, after all, if it did, then this thread would never have been
>> needed.
>
>
> There might be some antivirus software preventing Firefox from
> deleting some files.

Another possibility is that you have set up your computer with an
Administrator but you log in as a low privilege user so Windows doesn't
let your Firefox delete or change some files. Maybe try to login as
Administrator, or go into Windows to elevate your user privilege.

Please paste this into the address line of your Windows (File) Explorer
and figure out from there. Windows Explorer is the panel you use to
navigate among you folders (directories) and files:

Control Panel\All Control Panel Items\User Accounts

> I have been using the portable version of Firefox for ages. And I
> always use the portable versions of  all of my favourite software if I
> can find them. Some software would offer their own portable version,
> usually in a zip file.
>
> Maybe you should give Portable Firefox a shot. This website is very
> reliable:
>
> https://portableapps.com/apps/internet/firefox_portable
>
> After you have downloaded the executable file and run it, it will
> create a folder with everything required to run Firefox inside the
> folder. Nothing is in the Windows Registry. I usually keep all my
> portable software in a top-level folder in Drive D. You can make
> duplicate copies of the folder. If you want to be extra careful with
> your online banking, you can reserve one Portable Firefox folder
> exclusively for online banking.
>
> You can tell Firefox to clean up everything after you close Firefox,
> but some websites will have a lengthy login when they cannot find
> their cookie in your browser. You can figure out how to tell Firefox
> to leave those specific cookies alone.
>
>
>
>

On 2023-07-21, Mighty Wannabe wrote:
> There might be some antivirus software preventing Firefox from deleting
> some files.

I very much appreciate your help - and your kind advice.

I've been using computers as long as anyone, and, while in the olden days
we all used antivirus programs, nowadays we mostly use Windows Defender.

What's happening to me is exactly what Firefox does so it has nothing to do
with anything other than Firefox doesn't start clean for anyone even when
you set it to do what you had kindly suggested I set Firefox to do.

a. about:preferences#privacy
b. Scroll down and check the box that says:
c. Delete cookies and site data when Firefox is closed

My point is that Firefox is lying.
Not only to me.

Firefox is lying to you also.
And to everyone else.

It has nothing to do with the antivirus.
It has nothing to do with administrator privileges.

It has everything to do with how Firefox works.
When you set Firefox to start clean, Firefox will never start clean.

That's why I wrote the original post the way I wrote the original post.
I was exasperated by Firefox not doing what Firefox said it would do.

Firefox lied.
The good news is that the settings by Paul help Firefox make amends.

1. Start firefox & go to about:config
2. Change "browser.cache.disk.enable" from true to false
3. Change "browser.cache.disk_cache_ssl" from true to false
https://support.mozilla.org/en-US/questions/1313570

Rest assured I realize Mozilla didn't "lie" but what I mean is that
everyone "thinks" it does what you and I thought it did when you ask it to.

It didn't.

On 2023-07-20, Paul <nospam@needed.invalid> wrote:
> You can set cache2, to use RAM.
>
> When you exit the browser, the RAM is deallocated and information content is lost.
>
> "Switched browser cache from disk (SSD) to RAM, about:cache still displaying in disk too"
>
> https://support.mozilla.org/en-US/questions/1313570

I very much appreciate your help - and your kind advice.
I tested your workaround for two days and it seems to do what is desired.

1. Start firefox & go to about:config
2. Change "browser.cache.disk.enable" from true to false
3. Change "browser.cache.disk_cache_ssl" from true to false
https://support.mozilla.org/en-US/questions/1313570

The good news is that Firefox now starts clean.

1. Start Firefox & go to about:preferences#privacy
2. Press on "Clear Data" in the "Cookies and Site Data" section
3. Now it says there are "0 bytes" for all entries listed

BEFORE moving Firefox cache to RAM:
Cookies and Site Data (0 bytes)
Cached Web Content (some number of bytes)

AFTER moving Firefox cache to RAM:
Cookies and Site Data (0 bytes)
Cached Web Content (0 bytes)

I guess the only remaining issue is what is the downside of setting Firefox
to use RAM instead of the hard drive for cache.

Another way of asking that same question is to ask why did the Mozilla
developers choose to save their own personal cache on your hard drive?

Why didn't Firefox default to starting clean when we asked it to do that?

On 7/21/2023 2:41 PM, Incubus wrote:
> On 2023-07-21, Mighty Wannabe wrote:
>> There might be some antivirus software preventing Firefox from
>> deleting some files.
>
> I very much appreciate your help - and your kind advice.
>
> I've been using computers as long as anyone, and, while in the olden
> days we all used antivirus programs, nowadays we mostly use Windows
> Defender.
>
> What's happening to me is exactly what Firefox does so it has nothing
> to do with anything other than Firefox doesn't start clean for anyone
> even when you set it to do what you had kindly suggested I set Firefox
> to do.
>
> a. about:preferences#privacy
> b. Scroll down and check the box that says:
> c. Delete cookies and site data when Firefox is closed
>
> My point is that Firefox is lying.
> Not only to me.
>
> Firefox is lying to you also.
> And to everyone else.
>
> It has nothing to do with the antivirus.
> It has nothing to do with administrator privileges.
>
> It has everything to do with how Firefox works.
> When you set Firefox to start clean, Firefox will never start clean.
>
> That's why I wrote the original post the way I wrote the original post.
> I was exasperated by Firefox not doing what Firefox said it would do.
>
> Firefox lied.
> The good news is that the settings by Paul help Firefox make amends.
>
> 1. Start firefox & go to about:config
> 2. Change "browser.cache.disk.enable" from true to false
> 3. Change "browser.cache.disk_cache_ssl" from true to false
> https://support.mozilla.org/en-US/questions/1313570
>
> Rest assured I realize Mozilla didn't "lie" but what I mean is that
> everyone "thinks" it does what you and I thought it did when you ask
> it to.
>
> It didn't.

As I told you, I use the portable version of Firefox. After I have
checked the box against "Delete cookies and site data when Firefox is
closed", I close and reopen Firefox, the cookies and site data are
really gone when I check the cookies file.

What don't you try using the portable Firefox and see for yourself?

On 7/21/2023 2:42 PM, Incubus wrote:
> On 2023-07-20, Paul <nospam@needed.invalid> wrote:
>> You can set cache2, to use RAM.
>>
>> When you exit the browser, the RAM is deallocated and information
>> content is lost.
>>
>> "Switched browser cache from disk (SSD) to RAM, about:cache still
>> displaying in disk too"
>>
>> https://support.mozilla.org/en-US/questions/1313570
>
> I very much appreciate your help - and your kind advice.
> I tested your workaround for two days and it seems to do what is desired.
>
> 1. Start firefox & go to about:config
> 2. Change "browser.cache.disk.enable" from true to false
> 3. Change "browser.cache.disk_cache_ssl" from true to false
> https://support.mozilla.org/en-US/questions/1313570
>
> The good news is that Firefox now starts clean.
>
> 1. Start Firefox & go to about:preferences#privacy
> 2. Press on "Clear Data" in the "Cookies and Site Data" section
> 3. Now it says there are "0 bytes" for all entries listed
>
> BEFORE moving Firefox cache to RAM:
> Cookies and Site Data (0 bytes)
> Cached Web Content (some number of bytes)
>
> AFTER moving Firefox cache to RAM:
> Cookies and Site Data (0 bytes)
> Cached Web Content (0 bytes)
>
> I guess the only remaining issue is what is the downside of setting
> Firefox to use RAM instead of the hard drive for cache.
>
> Another way of asking that same question is to ask why did the Mozilla
> developers choose to save their own personal cache on your hard drive?
>
> Why didn't Firefox default to starting clean when we asked it to do that?

I don't have that problem, If you are one of the few, maybe the problem
is your Windows, not Firefox.

Try Firefox portable and see if your problem persists.

On 7/21/2023 3:19 PM, 😎 Mighty Wannabe ✅ wrote:
> On 7/21/2023 2:42 PM, Incubus wrote:
>> On 2023-07-20, Paul <nospam@needed.invalid> wrote:
>>> You can set cache2, to use RAM.
>>>
>>> When you exit the browser, the RAM is deallocated and information content is lost.
>>>
>>> "Switched browser cache from disk (SSD) to RAM, about:cache still displaying in disk too"
>>>
>>> https://support.mozilla.org/en-US/questions/1313570
>>
>> I very much appreciate your help - and your kind advice.
>> I tested your workaround for two days and it seems to do what is desired.
>>
>> 1. Start firefox & go to about:config
>> 2. Change "browser.cache.disk.enable" from true to false
>> 3. Change "browser.cache.disk_cache_ssl" from true to false https://support.mozilla.org/en-US/questions/1313570
>>
>> The good news is that Firefox now starts clean.
>>
>> 1. Start Firefox & go to about:preferences#privacy
>> 2. Press on "Clear Data" in the "Cookies and Site Data" section
>> 3. Now it says there are "0 bytes" for all entries listed
>>
>> BEFORE moving Firefox cache to RAM:
>> Cookies and Site Data (0 bytes)
>> Cached Web Content (some number of bytes)
>>
>> AFTER moving Firefox cache to RAM:
>> Cookies and Site Data (0 bytes)
>> Cached Web Content (0 bytes)
>>
>> I guess the only remaining issue is what is the downside of setting Firefox to use RAM instead of the hard drive for cache.
>>
>> Another way of asking that same question is to ask why did the Mozilla developers choose to save their own personal cache on your hard drive?
>>
>> Why didn't Firefox default to starting clean when we asked it to do that?
>
> I don't have that problem, If you are one of the few, maybe the problem is your Windows, not Firefox.
>
> Try Firefox portable and see if your problem persists.

On your Portable, nothing prevents a genius from
adjusting prefs.js or userchrome, before packaging your software.

Just because a software is Portable, does not alter the function
set. All the functions are there. But with programming of preferences,
you can achieve some result, just like setting the stuff by hand.

Paul

On 7/22/2023 4:41 AM, Paul wrote:
> On 7/21/2023 3:19 PM, 😎 Mighty Wannabe ✅ wrote:
>> On 7/21/2023 2:42 PM, Incubus wrote:
>>> On 2023-07-20, Paul <nospam@needed.invalid> wrote:
>>>> You can set cache2, to use RAM.
>>>>
>>>> When you exit the browser, the RAM is deallocated and information content is lost.
>>>>
>>>> "Switched browser cache from disk (SSD) to RAM, about:cache still displaying in disk too"
>>>>
>>>> https://support.mozilla.org/en-US/questions/1313570
>>> I very much appreciate your help - and your kind advice.
>>> I tested your workaround for two days and it seems to do what is desired.
>>>
>>> 1. Start firefox & go to about:config
>>> 2. Change "browser.cache.disk.enable" from true to false
>>> 3. Change "browser.cache.disk_cache_ssl" from true to false https://support.mozilla.org/en-US/questions/1313570
>>>
>>> The good news is that Firefox now starts clean.
>>>
>>> 1. Start Firefox & go to about:preferences#privacy
>>> 2. Press on "Clear Data" in the "Cookies and Site Data" section
>>> 3. Now it says there are "0 bytes" for all entries listed
>>>
>>> BEFORE moving Firefox cache to RAM:
>>> Cookies and Site Data (0 bytes)
>>> Cached Web Content (some number of bytes)
>>>
>>> AFTER moving Firefox cache to RAM:
>>> Cookies and Site Data (0 bytes)
>>> Cached Web Content (0 bytes)
>>>
>>> I guess the only remaining issue is what is the downside of setting Firefox to use RAM instead of the hard drive for cache.
>>>
>>> Another way of asking that same question is to ask why did the Mozilla developers choose to save their own personal cache on your hard drive?
>>>
>>> Why didn't Firefox default to starting clean when we asked it to do that?
>> I don't have that problem, If you are one of the few, maybe the problem is your Windows, not Firefox.
>>
>> Try Firefox portable and see if your problem persists.
> On your Portable, nothing prevents a genius from
> adjusting prefs.js or userchrome, before packaging your software.
>
> Just because a software is Portable, does not alter the function
> set. All the functions are there. But with programming of preferences,
> you can achieve some result, just like setting the stuff by hand.
>
> Paul
>
>

This website has been package population apps into a single file folder
that can be moved around in the computer or to another computer via a
USB flash drive, or even run from the cloud. It has tweaked the original
apps so that nothing is written to the Windows Registry, and all the
data are stored in the same folder. When it runs, it functions exactly
the same way, and you can change the settings and parameters exactly the
same way. Besides FireFox, my ThunderBird and SeaMonkey are all portable
apps:

Portable Firefox:
https://portableapps.com/apps/internet/firefox_portable

This is a list of all the portable apps this website has created from
the original apps (legally)
https://portableapps.com/apps

On 2023-07-22, Paul <nospam@needed.invalid> wrote:
> On your Portable, nothing prevents a genius from
> adjusting prefs.js or userchrome, before packaging your software.

I appreciate the help from the mighty wannabe and others but he's just
wrong that the portable Firefox works different in this cache situation.

The only reason others haven't noticed this problem is just that they don't
try to start Firefox clean. They probably save all sorts of logins & stuff.

That's why I said Firefox lied when you set Firefox to start clean.
Firefox will NOT start clean.

Unless.....

Unless you set the settings that you suggested we set.
1. Use the normal methods to set Firefox to start clean
2. It won't.
a. Start Firefox & go to about:preferences#privacy
b. Press on "Clear Data" in the "Cookies and Site Data" section
c. Firefox will NEVER say "0 bytes" for all entries listed
3. Use the method you suggested to help Firefox start clean.
4. It will.
a. Change "browser.cache.disk.enable" from true to false
b. Change "browser.cache.disk_cache_ssl" from true to false

The problem is solved.

The takeaway is that NOBODY can get Firefox to start clean.
If they don't set those two additional cache-related switches.

Anyone who says they can get Firefox to start clean who has not set those
switches is misinformed - because it's not possible any other way (AFAIK).

Thank you!